Freemium
Liquibase
Open SourceMigrations & ERD · Database
Open-source database schema change tracking and deployment.
migrationschemachangelog
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Migrations & ERD · Database
Open-source database schema change tracking and deployment.
Models & LLM APIs · AI for Developers
Open-source LLM gateway: one API for 100+ providers.
Models & LLM APIs · AI for Developers
Meta's open-weight LLM family with downloadable weights.
Models & LLM APIs · AI for Developers
The C/C++ inference engine that runs LLMs everywhere, even laptops.
Agent & LLM Frameworks · AI for Developers
Data framework for connecting LLMs to your data (RAG).
Models & LLM APIs · AI for Developers
Desktop app to discover, download and chat with local LLMs.
Models & LLM APIs · AI for Developers
Open-source AI chat framework with plugins and agent marketplace.
Load & Performance · Testing
Scalable user load testing written in Python.
Error Tracking · Monitoring & Observability
Session replay and frontend monitoring with error tracking.
Authentication · API Tools
Open-source auth infrastructure with a beautiful admin console — OIDC/OAuth, SSO and user management, self-hostable.
Internationalization · Frontend
Translation management for app teams — over-the-air updates, Figma integration and quality checks.
Logs & Metrics · Monitoring & Observability
Horizontally-scalable log aggregation designed like Prometheus.
Animation · Frontend
Platform for Lottie animations: preview, edit, host and embed.
AI Coding Assistants · AI for Developers
AI full-stack app builder with GitHub sync and Supabase integration.
Programming Languages
Official Lua website with reference manual and source.
Icons · Frontend
Beautiful, consistent open-source icon library with framework packages.
Mobile Backend & Services · Mobile Development
Simple YAML-driven UI testing for iOS and Android (trending).
Email · API Tools
Long-standing transactional email API for developers.
Email · API Tools
Self-hosted email testing tool with a web UI, catches local mail.
Email · API Tools
Email sandbox that safely captures mail from dev and staging.
CLI Tools · Development Environment
The classic build automation and task runner present everywhere.
UI Libraries · Frontend
Full-featured React components with hooks and theming out of the box.
Relational · Database
Community-developed MySQL fork with a permissive license.
Markdown · PDF & Documents
Free reference and tutorial for Markdown syntax.