Best API Gateways & Backends GitHub Repositories

OpenTelemetry Ruby API & SDK, and related gems

Feather is a modern Swift-based Content Management System.

Reference implementation of an apiserver for a custom Kubernetes API.

:ab: Tool to compare two revisions of a class API to check for BC breaks

Real-Time Open-source command center for MikroTik RouterOS v7. Streams live CPU, traffic, wireless clients, DHCP, WireGuard, firewall and geo connection data straight from the router API to your browser over a WebSocket. Alerts, reports, config management and zero-touch provisioning. One static Go binary, self-hosted, Docker-ready

Run Generative AI models with simple C++/Python API and using OpenVINO Runtime

A curated list of decision models (System One / typed decision models): hosted APIs, open-weight models, runtimes, SDKs, applications, benchmarks, and papers.

A Python wrapper around Synology API

Gentics Mesh - The open source headless CMS for developers

Easy, flexible and powerful cloud-native Laravel CMS package powered by AI with JSON:API, GraphQL API, templates, and themes

Composable ESLint rules for React and friends.

Cut your AI coding agent's token bill on three axes: terse prose, YAGNI-first code, and tool-output compression. Claude Code, Pi, Cursor, Codex, Gemini + 4 more. Zero deps, published benchmarks including the runs it loses.

MikoPBX — free open-source PBX for small business, built on Asterisk 22, PHP 8.4, and Phalcon 5. Deploy as ISO, Docker, LXC, or in the cloud.

Docker-compatible REST API on top of Apple container

Tencent Cloud API 3.0 SDK for Java

Engine makes it easier to create idiomatic APIs and Views that feel natural in SwiftUI without sacrificing performance

Multitenant backend server for building web and mobile apps rapidly. The backend for busy developers. (self-hosted or hosted)

Omicron: Oxide control plane

self-hosted media server with a Jellyfin-compatible API

PennyWise automatically reads transaction SMS messages and transforms them into organized financial data with on-device AI assistance. No manual entry, no cloud processing, complete privacy.