API Frameworks

public-apis

Python

100

A collective list of free APIs

langchain

Python

100

The agent engineering platform.

ComfyUI

Python

95

The most powerful and modular diffusion model GUI, api and backend with a graph/nodes interface.

neovim

Vim Script

95

Vim-fork focused on extensibility and usability

fastapi

Python

100

FastAPI framework, high performance, easy to learn, fast to code, ready for production

pi

TypeScript

100

AI agent toolkit: unified LLM API, agent loop, TUI, coding agent CLI

LocalAI

Go

100

LocalAI is the open-source AI engine. Run any model - LLMs, vision, voice, image, video - on any hardware. No GPU required.

eve

TypeScript

85

The Open Framework for Building Agents

CCFA-Skills

TeX

82

A skill family for shaping the research storyline of CCF-A papers.

bracket

TypeScript

90

Selfhosted tournament system

Pythia

TypeScript

80

One local API call gives your agent the entire live state of the planet — every major world event at once, plus forecasts. 40+ free keyless feeds, runs entirely on Ollama. No cloud, no cost. Keyless live feeds into one global view and forecasts what’s likely next. No cloud, no keys, no cost. 1d,1w,1m,1y predictions by Mirofish.

deltafin

Rust

72

Run full Kimi K3 on a single device. And an OpenAI-compatible API server for local chat and coding agents.

domain-sdk

TypeScript

77

Add, verify, monitor, and remove customer domains with one TypeScript API.

rockbox-zig

C

78

A modern, network-enabled music player platform built on Rockbox technology https://www.rockbox.org

FreeFrame

TypeScript

77

Open source alternative for frame.io

CodeJury

Python

72

Terminal-first, knowledge-grounded multi-agent software delivery pipeline: scope requirements, implement changes, run tests, and gate pull requests with deterministic QA and ensemble code review.

market-pilot

JavaScript

63

Evidence-grounded market research prototype with traceable AI workflows.

spinwin

Swift

58

macOS menubar app that visually rotates or spins another app's window, using ScreenCaptureKit to fake what macOS has no API to do

notesme

HTML

58

A lightweight, secure, and self-hosted note-taking application with end-to-end encryption, built with FastAPI and Vanilla JS.

shelftxt

Python

58

Open-source FastAPI recommendation engine for books • backend architecture • data handling • scalable systems