Open source software directory ranked & explained

n8n

TypeScript

95

Self-hosted workflow automation with native AI capabilities and 400+ integrations.

ollama

Go

90

Run open LLMs locally with one command. CLI and REST API included.

langchain

Python

95

The most widely used framework for building LLM applications with chains, agents, and RAG.

Flowise

TypeScript

90

Visual low-code builder for LangChain flows, RAG chatbots, and AI agents.

build-your-own-x

Markdown

85

Master programming by recreating your favorite technologies from scratch.

awesome

95

😎 Awesome lists about all kinds of interesting topics

public-apis

Python

95

A collective list of free APIs

freeCodeCamp

TypeScript

95

freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.

free-programming-books

Python

95

:books: Freely available programming books

openclaw

TypeScript

90

Your own personal AI assistant. Any OS. Any Platform. The lobster way. 🦞

interior

TypeScript

78

Interior provides high-fidelity, physics-based micro-interactions that prioritize accessibility, keyboard support, and smooth state transitions. It follows a 'copy-and-paste' philosophy where components are provided as single files containing a headless hook for logic and a styled component for visual reference, ensuring developers can easily reskin components without losing complex behavioral logic.

ai-sdk

Go

73

The Grafana AI SDK for Go enables developers to build AI-powered applications by providing a standardized interface for multiple providers (Anthropic, OpenAI, Bedrock, etc.). It allows Go backends to communicate seamlessly with React frontends via Server-Sent Events (SSE), supporting features like structured output, tool-calling, and agent observability.

hwatu

Rust

68

Hwatu delivers a 35 ms verification pass (load, eval, screenshot) with one command, 97 % pixel‑match accuracy, headless or headed windows, ad‑blocking, animation metrics, console and request error reporting, and interruptible human hand‑off—all from a single static binary that relies on the host’s WebKitGTK. It exposes its functionality via a minimal MCP server, a CLI, or a one‑line JSON socket, making it easy to integrate into existing agent harnesses.

sakura-crossing

JavaScript

77

Sakura Crossing is a procedural 3D world built with Three.js and Vite that simulates a Japanese suburb in blossom season. It features a unique '3D-to-2D' aesthetic achieved through custom toon materials, screen-space ink lines, and inverted-hull outlines. The world is mapped onto a spherical planet (160m radius) and includes complex features like a seamless railway, a drainage channel, and procedurally generated hills and water bodies, all without a single image asset in the source directory.

verified-3d-mesh-intersection

Lean

68

The project offers a Lean 4 verified kernel for exact 3D mesh intersection that satisfies a formal specification linking the output solid to the intersection of input solids and ensures well-formedness properties. The kernel is produced by AI agents, but its correctness is guaranteed by 60k lines of machine-checked proofs; a reviewer only needs to examine the 93-line specification and run Lean's checker. A WebAssembly demo enables interactive experimentation, though the UI and glue code remain unverified.

optim-plans

Python

73

optim-plans offers a command‑line controller and skill interface for Claude and Codex that: - Inspects a target repository and surfaces improvement opportunities. - Generates a PLAN_v1.md, then iteratively refines it with reviewer or criticizer loops. - Produces a manifest‑bound execution plan, runs code in a single controller‑owned worktree, and validates output with a read‑only validator. - Stores public artifacts as Markdown in docs/optim-plans/YYYY‑MM‑DD‑topic/ and machine state under .git/optim-plans/ for replayability. - Enforces safety via immutable manifests, nonce‑based approvals, Git audits, and bounded retry logic. - Supports both local CLI and plugin usage for Claude and Codex, with configurable worker choices and effort levels.