A list of Free Software network services and web applications which can be hosted on your own servers

Online problem-driven learning system

Your Personal AI OS

Everything you need to know about GraphQL💛

Interactive System Design Interview Simulator — practice designing distributed systems with real-time load simulation and scoring. Click on the link and ace your HLD interview

The sec3 audit reports and publications

An agent-managed museum exhibit, built in Rust with Gajae-Code / LazyCodex — developed and maintained with no human intervention.

A collection of daily coding challenges designed to help you master idiomatic Go through deliberate, repetitive practice.

Interactive Prometheus Training

Open-source security automation platform for teams and AI agents

Collection of solana programs to learn

AirPods liberated from Apple's ecosystem.

Usage-based pricing and billing for developers 🔓 Cloud or self-hosted ⚙️ No-code UI 💰 Realtime usage metering 🎟 Credits & top-ups 🔑 Control feature access

Inference at the speed of light.

Trigger.dev – build and deploy fully‑managed AI agents and workflows

HelixDB is an OLTP graph-vector database built in Rust on Object Storage.

Mastra is the modern TypeScript framework for AI-powered applications and agents.

Ready to Deploy Fullstack OpenSource Agentic Apps

The open source coding agent.

▦ Universal, standards-based auth provider.

Open Next.js adapter for Cloudflare

PostgreSQL reengineered for multi-tenant apps

Collection of templates using the Alchemyst AI Platform for your next big AI app.

Dome's Typescript SDK

coss.com/ui is the official design system of Cal.com

Effortlessly compose, extend, and observe every service in real-time for the first time ever.

💚 End-to-end encrypted cloud for everything.

The LLM Evaluation Framework

OCR & Document Extraction using vision models