Best Open Source open source Libraries

#1public-apis/public-apis

A collective list of free APIs

#2f/prompts.chat

f.k.a. Awesome ChatGPT Prompts. Share, discover, and collect prompts from the community. Free and open source — self-host for your organization with complete privacy.

#3x1xhlol/system-prompts-and-models-of-ai-tools

FULL Augment Code, Claude Code, Cluely, CodeBuddy, Comet, Cursor, Devin AI, Junie, Kiro, Leap.new, Lovable, Manus, NotionAI, Orchids.app, Perplexity, Poke, Qoder, Replit, Same.dev, Trae, Traycer AI, VSCode Agent, Warp.dev, Windsurf, Xcode, Z.ai Code, Dia & v0. (And other Open Sourced) System Prompts, Internal Tools & AI Models

#4langchain-ai/langchain

The agent engineering platform

#5godotengine/godot

Godot Engine – Multi-platform 2D and 3D game engine

#6redis/redis

For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.

#7facebook/docusaurus

Easy to maintain open source documentation websites.

#8santifer/career-ops

Open-source AI job search: scan job portals, score listings A-F, tailor your CV, track applications — runs locally in your AI coding CLI (Claude Code, Gemini, Codex, OpenCode…)

#9firstcontributions/first-contributions

🚀✨ Help beginners to contribute to open source projects

#10serhii-londar/open-source-mac-os-apps

🚀 Awesome list of open source applications for macOS. https://t.me/s/opensourcemacosapps

#11GitHubDaily/GitHubDaily

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.

#12bevyengine/bevy

A refreshingly simple data-driven game engine built in Rust

#13juspay/hyperswitch

An open source payments switch written in Rust to make payments fast, reliable and affordable

#14payloadcms/payload

Payload is the open-source, fullstack Next.js framework, giving you instant backend superpowers. Get a full TypeScript backend and admin panel instantly. Use Payload as a headless CMS or for building powerful applications.

#15janhq/jan

Jan is an open source alternative to ChatGPT that runs 100% offline on your computer.

#16calcom/cal.com

Scheduling infrastructure for absolutely everyone.

#17twentyhq/twenty

Building a modern alternative to Salesforce, powered by the community.

#18HeyPuter/puter

🌐 The Internet Computer! Free, Open-Source, and Self-Hostable.

#19spacedriveapp/spacedrive

Spacedrive is an open source cross-platform file explorer, powered by a virtual distributed filesystem written in Rust.

#20nextcloud/server

☁️ Nextcloud server, a safe home for all your data

#21AdguardTeam/AdGuardHome

Network-wide ads & trackers blocking DNS server

#22firecracker-microvm/firecracker

Secure and fast microVMs for serverless computing.

#23continuedev/continue

⏩ Source-controlled AI checks, enforceable in CI. Powered by the open-source Continue CLI

#24transloadit/uppy

The next open source file uploader for web browsers :dog:

#25CopilotKit/CopilotKit

The Frontend Stack for Agents & Generative UI. React + Angular. Makers of the AG-UI Protocol

#26farion1231/cc-switch

A cross-platform desktop All-in-One assistant tool for Claude Code, Codex, OpenCode, openclaw & Gemini CLI.

#27swagger-api/swagger-ui

Swagger UI is a collection of HTML, JavaScript, and CSS assets that dynamically generate beautiful documentation from a Swagger-compliant API.

#28voideditor/void

#29reflex-dev/reflex

🕸️ Web apps in pure Python 🐍

#30requarks/wiki

Wiki.js | A modern and powerful wiki app built on Node.js

#31NvChad/NvChad

Blazing fast Neovim framework providing solid defaults and a beautiful UI, enhancing your neovim experience.

#32Budibase/budibase

Build AI Agents the easy way. Supports PostgreSQL, MySQL, MariaDB, MSSQL, MongoDB, Rest API, Docker, K8s, and more 🚀 AI Workflow toolkit

#33gitroomhq/postiz-app

📨 The ultimate social media scheduling tool, with a bunch of AI 🤖

#34langchain-ai/langgraph

Build resilient language agents as graphs.

#35bagisto/bagisto

Free and open source laravel eCommerce platform

#36SigNoz/signoz

SigNoz is an open-source observability platform native to OpenTelemetry with logs, traces and metrics in a single application. An open-source alternative to DataDog, NewRelic, etc. 🔥 🖥. 👉 Open source Application Performance Monitoring (APM) & Observability tool

#37gitleaks/gitleaks

Find secrets with Gitleaks 🔑

#38Infisical/infisical

Infisical is the open-source platform for secrets, certificates, and privileged access management.

#39Cinnamon/kotaemon

An open-source RAG-based tool for chatting with your documents.

#40luong-komorebi/Awesome-Linux-Software

🐧 A list of awesome Linux softwares

#41mlflow/mlflow

The open source AI engineering platform for agents, LLMs, and ML models. MLflow enables teams of all sizes to debug, evaluate, monitor, and optimize production-quality AI applications while controlling costs and managing access to models and data.

#42dubinc/dub

The modern link attribution platform. Loved by world-class marketing teams like Framer, Perplexity, Superhuman, Twilio, Buffer and more.

#43Atlas-OS/Atlas

🚀 An open and lightweight modification to Windows, designed to optimize performance, privacy and usability.

#44docmost/docmost

Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion.

#45soxoj/maigret

🕵️‍♂️ Collect a dossier on a person by username from thousands of sites

#46wulkano/Kap

An open-source screen recorder built with web technology

#47birobirobiro/awesome-shadcn-ui

A curated list of awesome things related to shadcn/ui.

#48mikeroyal/Self-Hosting-Guide

Self-Hosting Guide. Learn all about locally hosting (on premises & private web servers) and managing software applications by yourself or your organization. Including Cloud, LLMs, WireGuard, Automation, Home Assistant, and Networking.

#49RunaCapital/awesome-oss-alternatives

Awesome list of open-source startup alternatives to well-known SaaS products 🚀

#50comet-ml/opik

Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.