apache / kafka

Distributed event streaming platform for building high-throughput data pipelines and streaming applications.

YunaiV / ruoyi-vue-pro

Chinese-language full-stack admin platform (Spring Boot + Vue) with RBAC, multi-tenancy, workflow, payments, mall, CRM/ERP modules, and WeChat mini-program support.

Paymenter / Paymenter

Open-source billing and webshop platform for hosting companies, handling subscriptions and customer services.

caddyserver / caddy

Extensible HTTP/1-2-3 web server written in Go that obtains and renews TLS certificates automatically by default.

antiwork / gumroad

Ruby on Rails source code for Gumroad, an e-commerce platform that lets creators sell products directly to consumers.

jeecgboot / JeecgBoot

Enterprise low-code platform (Spring Boot and Vue3) that generates frontend, backend, and database code from natural-language prompts or a code generator.

lichess-org / lila

Open source server powering lichess.org, a free, ad-free online chess platform with realtime games, analysis, and tournaments.

emqx / emqx

Scalable MQTT broker and IoT messaging platform supporting MQTT 5.0, CoAP, LwM2M, and MQTT over QUIC, with a SQL rule engine and data bridges.

juspay / hyperswitch

Open-source, self-hostable payments infrastructure in Rust that connects to many payment processors and offers routing, vault, and reconciliation modules.

Effect-TS / effect

TypeScript library for building type-safe production applications with typed errors, dependency injection, structured concurrency, and schema validation.

firebase / firebase-ios-sdk

Source for Firebase's open-source Apple platform libraries, covering auth, Firestore, messaging, storage, and more for iOS and macOS apps.