Curated open source apps, developer tools and self-hosted projects.
QPub Server is a self-hostable real-time messaging server offering pub/sub Channels over WebSocket and REST, plus job queues with workers and webhooks. It supports tenant isolation, rate limits, API key auth, and runs on NATS JetStream, Redis and Postgres or CockroachDB.
Sendium is an open-source, headless SMS gateway designed for high-throughput messaging. It bridges HTTP webhooks and SMPP infrastructure, offering advanced routing, granular TPS control, and reliable delivery receipt management for modern telecommunications.
MessageKit is a community-driven Swift library for building chat interfaces in iOS apps, serving as a replacement for JSQMessagesViewController. It offers customizable message cells, an input bar, and support for text, media, location, audio, contact, and link preview messages.
