build-your-own-x
by codecrafters-ioMaster programming by recreating your favorite technologies from scratch.
The best free replacements for expensive paid software — self-hosted and open-source alternatives the community trusts.
Made for anyone tired of subscriptions who wants free, proven replacements for paid software.
Alternatives to Paid Software (19)Self-Hosted Applications (51)Free Productivity Tools (51)Free Design Tools (51)Free Business Tools (50)Free AI Tools (50)Free Developer Tools (50)Privacy-Focused Alternatives (50)
Across all subcategories, ranked by GitHub stars.
Master programming by recreating your favorite technologies from scratch.
A collective list of free APIs
A list of Free Software network services and web applications which can be hosted on your own servers
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.
Free domain registration and practical DNS learning resources for everyone.
🙃 A delightful community-driven (with 2,500+ contributors) framework for managing your zsh configuration. Includes 300+ optional plugins (rails, git, macOS, hub, docker, homebrew,…
Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.
User-friendly AI Interface (Supports Ollama, OpenAI API, ...)
A cross-platform desktop All-in-One assistant for Claude Code, Codex, OpenCode,DeepSeek Harness and more. Only official website: ccswitch.io
Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini CLI: local…
Virtual whiteboard for sketching hand-drawn like diagrams
Open-source Python library for AI browser agents, plus Browser Use Cloud: stealth browsers and a hosted agent API.
:books: 免费的计算机编程类中文书籍,欢迎投稿
High performance self-hosted photo and video management solution.
The open-source app everyone uses to manage agents at work
JavaScript API for Chrome and Firefox
#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere
Turn any idea, plan, or codebase into a beautiful interactive diagram. An agent skill for Claude Code, Codex, and more.
A fancy self-hosted monitoring tool
🙌 OpenHands: AI-Driven Development
CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies
Never stop coding. Free MIT AI gateway: one endpoint, 375 providers (150+ free), 1,400+ models Kimi, Claude, GPT, Gemini, GLM, DeepSeek, MiniMax. Works with Claude Code, Codex,…
Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia
Local UI to run and train LLMs and diffusion models. Supports GGUF, MLX, Qwen3.8, DeepSeek-V4.1, MiniMax-H3, Gemma 4, FLUX and more.
A curated list of awesome Claude Skills, resources, and tools for customizing Claude AI workflows
Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS
An open-source, self-hostable PaaS alternative to Vercel, Heroku & Netlify that lets you easily deploy static sites, databases, full-stack applications and 360+ one-click services…
在 dsh 里装上这个插件即可,无需登录、注册或填 API Key,就能使用包括 DeepSeek V4.1 Flash、Kimi K3 在内的前沿模型——完全免费,不限量。 All you do is install this plugin in dsh: no login, no sign-up, no API key — the frontier…
Memos is an open-source, self-hosted note-taking app that brings your everyday thoughts together in a personal timeline. Your data stays yours, and you choose what to keep private…
A simple, lightweight PowerShell script that allows you to remove pre-installed apps, disable telemetry, as well as perform various other changes to declutter and customize your…
A skill to stop your coding agent from burying the answer. ADHD-friendly output.
The Free Software Media System - Server Backend & API
Git with a cup of tea! Painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD
A no-code RAG server that keeps answers in sync with your documents. Works with 8 vector databases. Built on Pathway.
The open-source cloud for agents & devs. Including Auth, Databases, Storage, Functions, Messaging, Hosting, Realtime, WAF and more
Complete API layer for private AI applications on local models: RAG, skills, tools, MCP, text-to-sql, and more. Works with any OpenAI-compatible inference server.
Odoo. Open Source Apps To Grow Your Business.
Open-source AI gateway. Self-hosted LLM gateway with OpenAI-, Claude- and Gemini-compatible APIs, model routing, access control, usage tracking and cost accounting.
ClickHouse® is a real-time analytics database management system
Your lightweight open-source personal agent.
2,926+ reusable AI agent skills for Claude Code, Codex, Cursor and Gemini CLI. AAS Core adds local catalog discovery, agent-owned selection and plan preview. CLI, MCP and plugins.
Debloat any Android or Google TV over Wi-Fi and get an Apple TV-style home.
the runtime your coding agents live on
坚持分享 GitHub 上高质量、有趣实用的开源技术教程、开发者工具、编程网站、技术资讯。A list cool, interesting projects of GitHub.
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
Local code intelligence for developers and AI agents. Connect code, docs and infrastructure in a persistent graph, with CBM Lens, MCP tools, agent integrations and change-aware…
The painless way to host your own Git service
An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together 开源、隐私优先、自托管的知识工作空间,让人与智能体在此协作
Data Engineering Zoomcamp is a free 9-week course on building production-ready data pipelines. Join the course here 👇🏼