
Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots

Tinode is a modern, open-source instant messaging platform designed as a federated alternative to XMPP with emphasis on mobile communication. It provides a complete messaging stack with backend in Go and native clients for iOS, Android, web, and command-line interfaces.
Tinode is ideal for developers and organizations seeking open-source messaging alternatives to proprietary platforms, enterprises requiring self-hosted communication infrastructure, and projects needing cross-platform instant messaging capabilities with federation support.

Your self-hosted, globally interconnected microblogging community

The Secure CommsOS™ for mission-critical operations

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

Huly — All-in-One Project Management Platform (alternative to Linear, Jira, Slack, Notion, Motion)

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

SimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps 📱!

CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies

Give your AI agent eyes to see the entire internet. Read & search Twitter, Reddit, YouTube, GitHub, Bilibili, XiaoHongShu — one CLI, zero API fees.

🌐 The Internet Computer! Free, Open-Source, and Self-Hostable.

🌐 The Internet Computer! Free, Open-Source, and Self-Hostable.

General-purpose AI designed for knowledge workers — creators, strategists, and operators — and individuals seeking AI systems they can truly control to help them get work done, with full flexibility to extend and deploy anywhere (VPC, on-prem, or cloud).

:hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error tracking, logs, and more – capture all the context agents need to diagnose problems, uncover opportunities, and ship fixes. Steer it all from Slack, web, desktop, or the MCP.

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

Infisical is the open-source platform for secrets, certificates, and privileged access management.

🎧 Your Personal Streaming Service

A self hosted virtual browser that runs in docker and uses WebRTC.