Showing 626 open source projects for "scratch"

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  • 1
    LLMs-from-scratch

    LLMs-from-scratch

    Implement a ChatGPT-like LLM in PyTorch from scratch, step by step

    LLMs-from-scratch is an educational codebase that walks through implementing modern large-language-model components step by step. It emphasizes building blocks—tokenization, embeddings, attention, feed-forward layers, normalization, and training loops—so learners understand not just how to use a model but how it works internally. The repository favors clear Python and NumPy or PyTorch implementations that can be run and modified without heavyweight frameworks obscuring the logic. ...
    Downloads: 1 This Week
    Last Update:
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  • 2
    RAG from Scratch

    RAG from Scratch

    Demystify RAG by building it from scratch

    RAG From Scratch is an educational open-source project designed to teach developers how retrieval-augmented generation systems work by building them step by step. Instead of relying on complex frameworks or cloud services, the repository demonstrates the entire RAG pipeline using transparent and minimal implementations. The project walks through key concepts such as generating embeddings, building vector databases, retrieving relevant documents, and integrating the retrieved context into language model prompts. ...
    Downloads: 0 This Week
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  • 3
    AI Engineering from Scratch

    AI Engineering from Scratch

    Learn it. Build it. Ship it for others

    AI Engineering from Scratch is a comprehensive open-source curriculum designed to teach artificial intelligence by building every component from first principles rather than relying on prebuilt frameworks. The project is structured into more than 20 phases and hundreds of lessons, covering topics that range from foundational mathematics to advanced systems such as large language models, retrieval pipelines, and multi-agent architectures.
    Downloads: 0 This Week
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  • 4
    AI Agents From Scratch

    AI Agents From Scratch

    Demystify AI agents by building them yourself. Local LLMs

    AI Agents from Scratch is an educational repository designed to teach developers how to build autonomous AI agents using large language models and modern AI frameworks. The project walks through the process of constructing agents step by step, beginning with simple prompt-based interactions and gradually introducing more advanced capabilities such as planning, tool use, and memory.
    Downloads: 0 This Week
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  • 5
    llms-from-scratch-cn

    llms-from-scratch-cn

    Build a large language model from 0 only with Python foundation

    llms-from-scratch-cn is an educational open-source project designed to teach developers how to build large language models step by step using practical code and conceptual explanations. The repository provides a hands-on learning path that begins with the fundamentals of natural language processing and gradually progresses toward implementing full GPT-style architectures from the ground up.
    Downloads: 0 This Week
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  • 6
    undici

    undici

    An HTTP/1.1 client, written from scratch for Node.js

    An HTTP/1.1 client, written from scratch for Node.js. This section documents our most commonly used API methods. Additional APIs are documented in their own files within the docs folder and are accessible via the navigation list on the left side of the docs site. Garbage collection in Node is less aggressive and deterministic (due to the lack of clear idle periods that browsers have through the rendering refresh rate) which means that leaving the release of connection resources to the garbage collector can lead to excessive connection usage, reduced performance (due to less connection re-use), and even stalls or deadlocks when running out of connections.
    Downloads: 3 This Week
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  • 7
    Pony OS

    Pony OS

    My Little Unix: Kernels are Magic

    ponyos is a lightweight, UNIX-like operating system developed as a personal hobby project by the creator of ToaruOS. It features a monolithic kernel written in C and aims for a POSIX-compliant environment with a built-from-scratch userland. ponyos includes a graphical interface, dynamic linker, shared libraries, and a package manager. It’s designed for fun, experimentation, and as a platform to learn and play with operating system internals, with surprisingly advanced features given its hobbyist origin.
    Downloads: 22 This Week
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  • 8
    Karpathy-Inspired Claude Code Guidelines

    Karpathy-Inspired Claude Code Guidelines

    A single CLAUDE.md file to improve Claude Code behavior

    ...The project organizes a progressive path through exercises, notebooks, code examples, and practical mini-projects that echo Karpathy’s approach to “learning by doing,” where students build core concepts from first principles rather than consuming superficial abstractions. It covers topics like implementing backpropagation from scratch, understanding convolutional and recurrent networks, building simple training loops, and exploring real datasets with hands-on code. This collection makes abstract theoretical ideas concrete by walking learners through real code and tangible outcomes, helping demystify parts of machine learning that often feel opaque in purely textbook settings.
    Downloads: 19 This Week
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  • 9
    Minosoft

    Minosoft

    An open source Minecraft reimplementation written from scratch

    Minosoft is an open-source reimplementation of the Minecraft client written primarily in Kotlin and Java. Rather than modifying the official client, the project attempts to recreate the functionality of the game from scratch while maintaining compatibility with Minecraft servers. The goal of Minosoft is to provide a more flexible and stable architecture that developers can experiment with while exploring alternative implementations of the Minecraft client. Because it is written with modern programming tools and languages, the project aims to improve reliability and extendability compared with traditional client software. ...
    Downloads: 1 This Week
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  • 10
    WooCommerce

    WooCommerce

    An open source eCommerce plugin for WordPress

    ...Create products, process orders, and keep an eye on key stats in real-time. WooCommerce is developer friendly, too. Built with a REST API, WooCommerce is scalable and can integrate with virtually any service. Design a complex store from scratch, extend a store for a client, or simply add a single product to a WordPress site. Your store, your way.
    Downloads: 10 This Week
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  • 11
    Budibase

    Budibase

    Create business apps and automate workflows in minutes

    ...Budibase pulls data from multiple sources, including MongoDB, CouchDB, PostgreSQL, MariaDB, MySQL, Airtable, S3, DynamoDB, or a REST API. And unlike other platforms, with Budibase you can start from scratch and create business apps with no data sources. Request new data sources.
    Downloads: 15 This Week
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  • 12
    os-tutorial

    os-tutorial

    How to create an OS from scratch

    os-tutorial is an open source educational project by cfenollosa that teaches the basics of building an operating system from scratch. The repository provides step-by-step lessons starting with bootloaders and moving through kernel development, interrupts, memory management, and system calls. Each tutorial is accompanied by clear explanations, code examples, and references to deepen understanding. The project uses x86 assembly and C to illustrate concepts, making it accessible to students and hobbyists interested in low-level programming. ...
    Downloads: 6 This Week
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  • 13
    Zed

    Zed

    High-performance, multiplayer code editor from the creators of Atom

    Zed is a next-generation code editor designed for high-performance collaboration with humans and AI. Written from scratch in Rust to efficiently leverage multiple CPU cores and your GPU. Integrate upcoming LLMs into your workflow to generate, transform, and analyze code. Chat with teammates, write notes together, and share your screen and project. Multibuffers compose excerpts from across the codebase in one editable surface. Evaluate code inline via Jupyter runtimes and collaboratively edit notebooks. ...
    Downloads: 25 This Week
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  • 14
    Bun

    Bun

    Incredibly fast JavaScript runtime, bundler, test runner

    ...Bun is an all-in-one JavaScript runtime & toolkit designed for speed, complete with a bundler, test runner, and Node. js-compatible package manager. Bun is a new JavaScript runtime built from scratch to serve the modern JavaScript ecosystem. Bun starts fast and runs fast. It extends JavaScriptCore, the performance-minded JS engine built for Safari. As computing moves to the edge, this is critical. Bun provides a minimal set of highly optimized APIs for performing common tasks, like starting an HTTP server and writing files. ...
    Downloads: 11 This Week
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  • 15
    Hermes Agent

    Hermes Agent

    The agent that grows with you

    ...Rather than functioning as a stateless chatbot, it maintains long-term memory across sessions and can generate searchable “Skill Documents” that capture how it solved complex tasks so it doesn’t start from scratch each time. The agent interfaces with messaging platforms like Telegram, Discord, Slack, and WhatsApp through a single gateway process, and also offers an interactive terminal user interface with history, autocomplete, and streamable tool output. It supports scheduled automation in natural language, allowing users to set up recurring tasks such as daily briefings or system audits that it runs unattended.
    Downloads: 143 This Week
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  • 16
    UTM

    UTM

    Virtual machines for iOS and macOS

    UTM is a full-featured system emulator and virtual machine host for iOS and macOS. It is based off of QEMU. In short, it allows you to run Windows, Linux, and more on your Mac, iPhone, and iPad. UTM/QEMU requires dynamic code generation (JIT) for maximum performance. JIT on iOS devices requires either a jailbroken device or one of the various workarounds found for specific versions of iOS. UTM SE ("slow edition") uses a threaded interpreter which performs better than a traditional...
    Downloads: 192 This Week
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  • 17
    Modern.js

    Modern.js

    The meta-framework suite designed from scratch for web development

    The meta-framework suite was designed from scratch for frontend-focused modern web development. Both "server-side routing" and "client-side routing" are supported. Serverless paradigm of "dynamic and static integrated Web". Low-threshold, full-featured, integrated "BFF" development. Modern.js provides out-of-the-box support for mainstream IDEs such as VS Code, and has features such as automatic detection and repair of Lint problems, access checks before code submission, etc., which can make code development more efficient and intelligent. ...
    Downloads: 4 This Week
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  • 18
    SimpleLLM

    SimpleLLM

    950 line, minimal, extensible LLM inference engine built from scratch

    SimpleLLM is a minimal, extensible large language model inference engine implemented in roughly 950 lines of code, built from scratch to serve both as a learning tool and a research platform for novel inference techniques. It provides the core components of an LLM runtime—such as tokenization, batching, and asynchronous execution—without the abstraction overhead of more complex engines, making it easier for developers and researchers to understand and modify.
    Downloads: 2 This Week
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  • 19
    CopilotKit

    CopilotKit

    Build in-app AI chatbots, and AI-powered Textareas

    ...The AI chatbot can talk to your app frontend & backend, and to 3rd party services (Salesforce, Dropbox, etc.) via plugins. Autocompletion + AI editing + generate from scratch. Indexed on your users' content.
    Downloads: 2 This Week
    Last Update:
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  • 20
    MiniMind

    MiniMind

    Train a 26M-parameter GPT from scratch in just 2h

    minimind is a framework that enables users to train a 26-million-parameter GPT (Generative Pre-trained Transformer) model from scratch in approximately two hours. It provides a streamlined process for data preparation, model training, and evaluation, making it accessible for individuals and organizations to develop their own language models without extensive computational resources.
    Downloads: 0 This Week
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  • 21
    GPT All Star

    GPT All Star

    AI-powered code generation tool for scratch development of web apps

    AI-powered code generation tool for scratch development of web applications with a team collaboration of autonomous AI agents. This is a research project, and its primary value is to explore the possibility of autonomous AI agents.
    Downloads: 0 This Week
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  • 22
    S&box

    S&box

    s&box is a modern game engine, built on Valve's Source 2

    ...The platform emphasizes multiplayer and community experiences, giving creators direct control over networking, physics, rendering, and audio without needing to build those systems from scratch. With real-time recompilation and fast iteration loops, developers can see changes instantly, speeding up the creative process dramatically compared to traditional engines. The sbox ecosystem fosters collaboration, sharing, and extension through packages and community content, enabling a vibrant marketplace of user-created mods and assets.
    Downloads: 164 This Week
    Last Update:
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  • 23
    QtScrcpy

    QtScrcpy

    Android real-time display control software

    ...If you are interested in it and want to learn how it works but do not know how to get started, you can choose to purchase my recorded video lessons. It details the development architecture and the development process of the entire software, and help you develop QtScrcpy from scratch.
    Downloads: 243 This Week
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  • 24
    fheroes2

    fheroes2

    fheroes2 is a recreation of Heroes of Might and Magic II game engine

    fheroes2 is a recreation of the Heroes of Might and Magic II game engine. This open-source multiplatform project, written from scratch, is designed to reproduce the original game with significant improvements in gameplay, graphics and logic (including support for high-resolution graphics, improved AI, numerous fixes and user interface improvements), breathing new life into one of the most addictive turn-based strategy games. You can find a complete list of all of our changes and enhancements in its own wiki page.
    Downloads: 36 This Week
    Last Update:
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  • 25
    glaucus

    glaucus

    A simple and lightweight Linux distribution based on musl libc

    Glaucus is a Linux distribution built from scratch, focusing on simplicity, security, and performance.
    Downloads: 0 This Week
    Last Update:
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