Dl4All: download free for all software and educational resources

Free software and educational resources: antivirus, office suites, graphic design, portable apps, video editing, multimedia tools, system utilities, online courses and eBooks. Browse the latest releases below or search for what you need.

Free Ebooks Download

Romulus and Remus The History and Legend of Ancient Rome's Mythical Founders


Romulus and Remus: The History and Legend of Ancient Rome's Mythical Founders
English | October 8, 2026 | ASIN: B0HMDPVRYK | 52 pages | Epub | 2.16 MB
Few stories from the ancient world have survived with quite the enduring power as that of Romulus and Remus, one of whom would go on to found the most famous city in the world. The story of these twins became the foundational tale of Rome's establishment, but as with similar traditions preserved by other ancient civilizations, the further people attempt to look into the past, the more difficult it becomes to separate history from legend. The two brothers always occupied an important place among Romans and remain among the most famous figures associated with antiquity, but whether Romulus and Remus were actual historical individuals remains one of the enduring questions surrounding Rome's origins.The most familiar version of the legend asserts that Romulus and Remus descended from Trojan royalty, and according to Roman tradition, their grandfather Numitor was overthrown by Numitor's brother Amulius, who feared Numitor's descendants might one day return to claim the throne for themselves. In an attempt to prevent this, the twins were condemned to death by being left on the banks of the Tiber, where they were discovered by a she-wolf who cared for them until they were found by the shepherd Faustulus and raised alongside his wife. Eventually the twins learned of their royal ancestry, overthrew Amulius, and restored their grandfather to the throne, but rather than simply returning to Alba Longa, they decided to establish a settlement of their own.It was at this point that the story took its most famous and tragic turn. The brothers disagreed over where the new city should be founded and, ultimately, over who should rule it. Their rivalry ended with the death of Remus, leaving Romulus as the sole founder and first king of Rome in 753 B.C.It is a remarkable story, and perhaps its very nature is one of the main reasons it has survived for over 2,500 years, but it is important to remember that the Romans themselves did not preserve a single, universally accepted version of the story. From author to author, the details varied, and different traditions applied different roles to the gods, kings and heroes involved in the founding of Rome. The she-wolf, the shepherds, the quarrel between the brothers itself, and even Remus's untimely death were all subjected to reinterpretation as centuries passed. By the time Roman historians began writing down detailed accounts of Rome's history, the events they sought to highlight and pass on to future generations took place many centuries before their own lifetimes.As gripping as the story has been for over 2,500 years, modern historians agree that it is mere legend, and that it has obscured the actual history of Rome's origins. Rome did not simply appear from nowhere in the 8th century B.C., nor did the people living around what later became one of the most powerful and influential cities in history leave behind a written account explaining the circumstances of its origins. In the present day, archaeology has filled in some of the mysteries surrounding the earliest parts of Rome's history, showing that the hills surrounding the city were populated by distinct communities long before the traditional founding date, while settlements even stood in regions that would eventually become part of the city itself. Villages gradually expanded, merged, and developed relationships with neighboring communities. The inhabitants of Latium interacted with the Etruscans to the north, as well as the Greek communities who lived throughout Italy. From the perspective of modern scholarship, Rome was the product of a long process of settlement, interaction, and political development rather than a city created by one extraordinary individual.

Free Ebooks Download

Revolutions and the Transformation of Society Social Movements in 18th and 19th Century Europe


Revolutions and the Transformation of Society: Social Movements in 18th and 19th Century Europe
English | April 14, 2025 | ISBN: 9798230852605 | 107 Pages | EPUB (True) | 273.32 KB
This book explores the tumultuous period of the late 18th and 19th centuries, when Europe witnessed profound social, political, and economic upheavals. The book examines key revolutions, such as the French and Industrial Revolutions, and the social movements that arose in their wake, including the rise of nationalism, socialism, and workers' movements. Through detailed historical analysis and an exploration of the ideas and figures that shaped these movements, Shaw discusses how these social changes reshaped European societies, from the fall of feudalism to the rise of the modern nation-state. The book highlights the struggles of ordinary people, including workers, women, and nationalists, as they fought for political representation, social justice, and economic equality, leading to the formation of mass political movements and the birth of modern democracy. Shaw argues that these revolutions and social movements laid the groundwork for the political landscapes of the 20th century and beyond, providing a deep understanding of the forces that continue to influence global societies today.

Free Ebooks Download

Reactive Programming Handling Asynchronous Data Streams and Events with a Declarative Approach (Programming Models)


Reactive Programming: Handling Asynchronous Data Streams and Events with a Declarative Approach (Programming Models)
English | September 27, 2026 | ASIN: B0HG7SRG6N | 458 pages | Epub | 1.23 MB
Master Asynchronous Streams With Reactive ThinkingModern applications must respond to continuous events, asynchronous operations, real-time data, and changing system states. Reactive Programming: Handling Asynchronous Data Streams and Events with a Declarative Approach provides a practical path into this increasingly important programming paradigm. Written in a technical-informal explanatory tone with instructional clarity, this book makes reactive concepts accessible while retaining the technical depth needed for serious software development.Build Responsive Applications Through Declarative FlowsMove beyond conventional sequential programming and learn how streams, observables, events, subscriptions, asynchronous execution, concurrency, and backpressure work together. Explore reactive composition, data transformation, filtering, event processing, and error handling while learning how reactive techniques can power responsive interfaces, web services, APIs, messaging systems, microservices, IoT applications, and real-time platforms.Explore Ten Languages And Reactive TechniquesThe book provides practical coverage of C#, Dart, Elixir, F#, Go, Java, jаvascript, Python, Scala, and Swift, showing how reactive concepts translate across different programming ecosystems. It also examines observer pattern algorithms, event stream processing, propagation of changes, reactive trees, queues, buffers, graphs, and dependency structures.Connect Principles With Patterns And FutureFrom foundational concepts through real-world architectures, design patterns, testing, optimization, distributed systems, artificial intelligence, edge computing, and emerging research, this book develops a complete understanding of reactive programming. Whether you are learning reactive programming, expanding your asynchronous programming skills, or designing scalable event-driven systems, this guide provides a structured foundation for building software that responds intelligently to continuous change.

Free Ebooks Download

ROME TRAVEL GUIDE 2027 Where to Stay by Neighborhood, Step-by-Step Itineraries, Colosseum and Vatican Booking Made Simple


ROME TRAVEL GUIDE 2027: Where to Stay by Neighborhood, Step-by-Step Itineraries, Colosseum and Vatican Booking Made Simple, Detailed Maps, Local Restaurants and Every New Rule Visitors Need to Know
English | September 23, 2026 | ASIN: B0HKSP1NXQ | Pages not found | PDF | 6.46 MB
A good Rome trip is decided long before you land.Rome is one of the most visited cities in the world, and a few early choices shape everything that follows. Many major sites are entered by timed ticket. The neighborhood you pick decides how much walking and transit fills each day. Costs and entry paperwork can change from one year to the next. Rome Travel Guide 2027 is a full color guide with maps that puts these decisions in the order you will face them, then takes you through the city district by district.With this guide, you can:Estimate your trip costs using the 2027 costs chapter, the budget planning chapter, and the budget worksheet in the appendicesReview the entry, ETIAS, and paperwork chapter while you planPrepare for timed entry to the Colosseum, the Vatican, and other sites with a dedicated booking chapter and a booking countdownCompare neighborhoods and choose where to stayFollow step by step itineraries, or build your own from the district chaptersFind local restaurants and learn how to order once you sit downGet around using the transport appendix, the getting around chapter, and maps and navigation adviceHandle everyday exchanges with Italian survival phrasesRead about common mistakes to avoid in the insider tips chapterThe districts coveredAncient Rome: the Colosseum, Forum, Palatine, and CapitolineCentro Storico: the Pantheon, Piazza Navona, Campo de' Fiori, the Trevi Fountain, and the Spanish StepsVatican City and PratiTrastevere, the Ghetto, and TestaccioMonti, the great basilicas, Villa Borghese, and the Appian WayDay trips from RomeAlso includedA Top 20 list of Rome experiences and a Rome at a Glance overviewA chapter on Rome for different kinds of travelersFestivals and events for 2027, with 2027 holidays in the appendicesPacking advice, emergency contacts, and conversionsFront sections on how to use the guide, what changed for 2027, and how the guide was researchedWritten for first time visitors and returning travelers who want costs, bookings, and routes in one place.DisclaimerThis is an independent publication and is not affiliated with, endorsed by, or sponsored by any government agency, transport operator, attraction, ticketing service, or business mentioned. Entry requirements, travel authorization rules, prices, opening hours, ticketing systems, and transport services change often. Please confirm current details with official sources and providers before booking or traveling. Maps are provided for general orientation only. The publisher and author accept no liability for loss, inconvenience, or damages arising from the use of this information.

Free Ebooks Download

RF ENGINEERING Principles, Circuits, and Systems From Transmission Lines to Wireless Transceivers


RF ENGINEERING: Principles, Circuits, and Systems From Transmission Lines to Wireless Transceivers
English | October 4, 2026 | ASIN: B0HLX13R12 | 277 pages | Epub | 6.05 MB
Every wireless device that surrounds us, from the phone in a pocket to the radar in a car bumper and the satellite link that carries a television channel, depends on a body of knowledge that engineers call radio-frequency (RF) engineering. At these frequencies the comfortable rules of low-frequency circuit theory begin to fail: a length of copper is no longer a simple wire, a capacitor becomes an inductor above its self-resonant frequency, and the layout of a printed circuit board becomes as important as the schematic drawn on it. This book was written to guide the reader through that transition in a way that is rigorous, practical, and, I hope, enjoyable.The text grew out of many years of teaching RF and microwave courses to undergraduate and postgraduate students, and of supervising laboratory projects in which students designed, built, and measured real circuits. The recurring lesson from that experience is that RF engineering is learned best when theory, design procedure, simulation, and measurement are kept side by side. Accordingly, each chapter develops the physical ideas first, derives the essential equations carefully, and then converts the equations into step-by-step design methods that are illustrated with fully worked numerical examples.The seventeen chapters follow a natural path. Chapters 1 to 3 build the foundations: the RF spectrum, the decibel, skin effect, transmission-line theory, and the Smith chart. Chapters 4 to 6 treat impedance matching, network parameters and scattering parameters, and the planar transmission lines and waveguides on which practical circuits are built. Chapters 7 to 9 cover passive components, resonators, power dividers, couplers, and filters. Chapters 10 to 13 move to active circuits: small-signal amplifiers and stability, noise and low-noise amplifiers, power amplifiers and nonlinearity, and finally mixers, oscillators, and frequency synthesizers. Chapters 14 and 15 widen the view to antennas, radio propagation, transceiver architectures, link budgets, and RF measurement techniques. Chapter 16 turns to the practical craft of RF hardware: circuit-board stack-ups, layout parasitics, decoupling, shielding, electromagnetic compatibility, and bring-up, and Chapter 17 applies the ideas of the whole book to radar and RF sensing systems, from the radar range equation to 77 GHz FMCW automotive radar. Four appendices collect useful constants and formulas, suggest further reading, provide a compact Python toolbox that implements the principal design equations of the book, and review the mathematical tools used throughout.Several features have been included to make the book useful both in the classroom and on the bench. Learning objectives open every chapter, and key-point boxes highlight ideas that are easy to forget. Worked examples show complete numerical solutions with realistic component values. Short Python programs demonstrate how the design equations are implemented in code, so that the reader can experiment with parameters and see the consequences immediately. Each chapter ends with a summary, a hands-on design project, and a set of problems ranging from routine exercises to open-ended design tasks.The reader is assumed to be familiar with basic circuit analysis, complex numbers, phasors, and elementary electromagnetics. No prior exposure to RF design is required. Mathematical developments are kept as transparent as possible; whenever a result is quoted rather than derived, the reason and the conditions of validity are stated.

Free Ebooks Download

RETRIEVAL-AUGMENTED GENERATION RAG, Vector Databases and Knowledge-Driven AI Foundations, Architectures, Evaluation


RETRIEVAL-AUGMENTED GENERATION: RAG, Vector Databases and Knowledge-Driven AI : Foundations, Architectures, Evaluation and Production Systems for Grounded Language Models
English | September 21, 2026 | ASIN: B0HKJCJ8YJ | 327 pages | Epub | 5.40 MB
In the space of a few years, large language models moved from laboratory curiosities to instruments that draft our contracts, summarise our clinical notes and answer our customers. Yet anyone who has deployed such a model in a serious setting has met the same wall: the model is articulate about everything and accountable for nothing. It will describe a refund policy that does not exist, cite a statute that was never enacted, and do so in prose of impeccable confidence. The model is not lying; it has no notion of a fact to lie about. It has learned a probability distribution over text, and a probability distribution has no bibliography.Retrieval-augmented generation is the engineering answer to that predicament. Instead of asking a network to remember the world inside its weights, we let it look things up. A retriever finds evidence, a generator reasons over that evidence, and the answer arrives with a trail back to its sources. The idea is simple enough to state in one sentence and deep enough to occupy an entire research literature, because everything interesting lies in the details: how text is cut into passages, how meaning is turned into geometry, how a billion vectors are searched in milliseconds, how conflicting evidence is reconciled, and how we know whether any of it worked.This book is my attempt to set those details down in one place, in the order in which a reader actually needs them.Who this book is forThe book is written for three audiences that I have taught and worked with, and it tries to serve all three without diluting any of them.• Senior undergraduate and postgraduate students in computer science, data science and information retrieval who need a rigorous course text rather than a collection of blog posts. Each chapter ends with a summary and graded exercises suitable for coursework.• Practising engineers and architects who must ship a retrieval system that is fast, cheap, auditable and secure, and who need the reasoning behind the defaults, not only the defaults.• Researchers and technical managers who want a map of the field: what is settled, what is contested, and where the open problems are.The mathematical prerequisites are modest and mostly confined to linear algebra and elementary probability; Appendix A collects everything the main text assumes. The programming examples are in Python, which is where the ecosystem lives, but the ideas are language-agnostic.How this book is organisedPart I builds the foundations: why parametric memory fails, how text becomes vectors, what an embedding space really is, how vector databases store and index those vectors, and the algorithms that make approximate nearest-neighbour search tractable. Part II constructs a production pipeline end to end: ingestion, parsing, chunking, indexing, hybrid retrieval, query transformation, re-ranking, context assembly and grounded generation. Part III treats the advanced systems that define the current frontier: self-correcting and agentic architectures, knowledge graphs, multimodal and long-context retrieval, evaluation, optimisation and security. Part IV puts everything to work through four complete, buildable projects and a set of deployment case studies.Chapters are meant to be read in sequence the first time and consulted out of order thereafter. Cross-references are given by section number so that the book remains usable as a reference.

Free Ebooks Download

RASPBERRY PI EDGE AI PROJECTS Build Intelligent Cameras, Voice Assistants, IoT Devices and Offline AI Systems


RASPBERRY PI EDGE AI PROJECTS : Build Intelligent Cameras, Voice Assistants, IoT Devices and Offline AI Systems with Raspberry Pi 5
English | October 10, 2026 | ASIN: B0HMK1673Z | 417 pages | Epub | 649.26 KB
Have you ever built a Raspberry Pi AI project that worked perfectly on the bench, only to become slow, unstable, or difficult to maintain once you added a camera, sensors, networking, and continuous inference?Do you want to run useful AI locally on your Raspberry Pi 5 without sending every image, recording, or sensor reading to the cloud? Or can you follow Raspberry Pi tutorials yet still feel unsure how to turn separate examples into one reliable intelligent device?Raspberry Pi Edge AI Projects is designed for that exact transition: from getting an AI demonstration to engineering a complete Edge AI system that can sense, analyze, decide, and respond.Rather than treating AI, Python, Linux, hardware, and networking as separate topics, this book shows how they work together in practical systems. You will learn to deploy machine-learning models locally, build efficient computer-vision pipelines, connect cameras and microphones, integrate sensors and actuators, and design devices that can continue operating when Internet connectivity disappears.You will work toward systems such as intelligent cameras, AI security devices, offline speech recognition, local voice assistants, appropriately sized language-model applications, MQTT-connected IoT devices, multi-sensor monitors, AI-powered robots, local APIs, browser dashboards, and cloud-connected systems designed to remain useful offline.But building the system is only part of the challenge.An accurate model that consumes too much CPU is not a successful real-time application. A voice assistant that stops working without the Internet is not genuinely offline. A security camera that crashes after several hours is not reliable. And when something fails, knowing that "the project doesn't work" is very different from knowing which layer failed, why it failed, how to verify the diagnosis, and what to change.That engineering mindset is central to this book.You will learn how to reason about latency, throughput, memory, thermal behavior, storage, power, model accuracy, quantization, inference runtimes, hardware acceleration, networking, security, monitoring, recovery, and long-term maintenance—the practical constraints that determine whether a Raspberry Pi AI project remains useful beyond the initial demonstration.The progression takes you from Edge AI architecture and Raspberry Pi 5 preparation through model deployment and optimization, real-time vision, intelligent cameras, AI acceleration, speech recognition, local voice assistants, language models, sensors, MQTT, IoT, robotics, APIs, dashboards, containers, testing, security, monitoring, updates, and recovery.For makers, it provides a structured path into meaningful AI projects without requiring professional machine-learning experience. For intermediate Raspberry Pi users, it addresses the gap between connecting components and engineering the complete system. For Python, IoT, and aspiring Edge AI developers, it develops the practical skills needed to deploy and maintain intelligent devices at the edge.Getting a model to run is not the same as engineering an AI system.This book helps bridge that gap.If you are ready to move beyond isolated Raspberry Pi examples and build local, connected, resilient, and genuinely useful Edge AI devices, start building with Raspberry Pi 5—and learn how to make your systems work when real conditions begin to matter.

Free Ebooks Download

RAF in Camera 1985-1989 1985-1989


RAF in Camera: 1985-1989: 1985-1989
English | June 19, 2026 | ISBN: 1036138755 | 320 pages | EPUB (True) | 78.36 MB
Conveys the RAF's pivotal evolution in the latter half of the decade, highlighting modernization, modernization's consequences, and the shift in military aviation culture.RAF in Camera: 1980s - The Later Years by Keith Wilson provides a visually rich account of the Royal Air Force during the transformative latter half of the 1980s. This continuation of Wilson's earlier work examines the RAF's operational and technological evolution during a pivotal decade for British military aviation.The period witnessed the retirement of iconic aircraft like the English Electric Lightning in 1988, symbolizing the end of a Cold War era. Simultaneously, the RAF introduced advanced platforms that redefined its capabilities, including the Tornado F.3 Interceptor, Harrier GR.5, British Aerospace BAe 146 CC.1, and Tucano T.1 trainer. Additionally, the innovative conversion of Lockheed Tristar and Vickers VC10 airliners into aerial refuelling tankers replaced the aging Victor K.2, enhancing the RAF's strategic reach.Year-by-year coverage explores milestones such as the post-Falklands War recovery of military confidence and the integration of cutting-edge technology into RAF operations. Illustrated with numerous photographs, the book captures the RAF's modernization and the cultural shifts within the service.Meticulously researched, RAF in Camera: 1980s - The Later Years offers aviation enthusiasts and historians alike a detailed exploration of the RAF's evolution, blending iconic imagery with insightful analysis of this critical period in its history.

Free Ebooks Download

Queen Victoria's Colonial Troops, 1837-1901 Organization, Uniforms and Equipment


Queen Victoria's Colonial Troops, 1837-1901: Organization, Uniforms and Equipment
English | March 31, 2026 | ISBN: 103610334X | 240 pages | EPUB (True) | 100.16 MB
"I'm not sure how many of these in-depth looks at the Organization, Uniforms & Equipment of various armies that Esposito has written, but the unit examinations remain the same high quality in this volume... the information within is golden." - Historical Miniatures Gaming SocietyQueen Victoria famously presided over an empire upon which the sun never set. Extending, defending and policing Britain's global territories required the British Army to fight a bewildering array of foes, in equally varied terrain and climates. From the subarctic mountains of Canada to the Sahara Desert and the South African veldt, from the jungles of West Africa and central India to China, the British forces flew the flag. The task was only made possible by the recruitment of troops from throughout the colonies, some of which then served far from home (such as the Australians used in the Boer Wars). Colonial troops not only boosted the numbers available to the Empire's forces but their local knowledge of climate and terrain, as well as their differing fighting styles, offered vital variety and flexibility. This allowed the 'British' armies to adapt to the wide range of enemies and environments encountered.Gabriele Esposito offers an excellent overview of the troops raised from every corner of the British Empire, discussing their organization, weapons, uniform and equipment as well as how and where they were employed. The informative text is lavishly illustrated with colour artworks.

Free Ebooks Download

Quantum Distortion Gravity A Complete One-Loop Analysis of the Minimal Truncation - Second Edition, Revised and Corrected


Quantum Distortion Gravity: A Complete One-Loop Analysis of the Minimal Truncation - Second Edition, Revised and Corrected
English | October 9, 2026 | ASIN: B0HMGC8SJR | 285 pages | Epub | 4.56 MB
Quantum Distortion Gravity (QDG) is a metric-affine framework in which the connection is split into the Levi-Civita part and a distortion tensor, and Weyl symmetry is gauged. This monograph develops the theory from its classical foundations to a one-loop renormalization-group analysis.Part I reviews the functional renormalization group, metric-affine geometry, Weyl symmetry and the heat-kernel method. Part II builds the classical theory: the irreducible decomposition of the distortion, a no-go theorem for bare invariants, the Weyl-invariant action and its infrared limit. Part III treats the quantization: constraint analysis, BRST-BV quantization, the Weyl anomaly and the anomaly-induced action. Part IV derives the flow of the Einstein-Hilbert sector from the Wetterich equation, adds minimally coupled matter, and solves the non-Gaussian fixed point in closed form. It tests the existence of the fixed point against nine regulators and states how it depends on the matter content. Parts V and VI cover advanced topics (heat kernel in a background field strength, scale generation, cosmology, gravitational waves, spectral dimension) and a canonical formulation in Ashtekar variables.The second edition replaces the flow of the first edition, which was not derived from the Einstein-Hilbert action, with a derived one; the old flow is kept as a clearly labelled model. Every chapter says what is derived, what is quoted from the literature and what remains an open problem. Most chapters end with exercises, solutions are given for a selection, and the Python code behind the numerical results is distributed with the book.Intended readers: graduate students and researchers in quantum gravity, asymptotic safety and metric-affine gravity.Released under a Creative Commons Attribution 4.0 licence.

About Dl4All

Our site Dl4All offers free software downloads including antivirus software, office suites, graphic design software, portable apps, video editing software, multimedia tools, system utilities and many other popular applications. Here you can find software reviews and ratings so you can understand which apps are worth downloading. If you're looking for free educational programs or materials in the US and Canada, we'll help you find what you need for students and learners.

If you are looking for educational materials, our website offers free downloadable online courses, from computer science to business and humanities. The courses are taught by professors from leading universities around the world, and you can earn a certificate of completion from many of them.

There is also a wide range of courses available, from engineering to languages and social sciences. You can also search for free software and educational resources on Google or other search engines. Just remember to read reviews and check the website's reputation before downloading anything.

Dl4All is download free for all software and educational resource. With a little searching, you can download what you need for free without spending any money.