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Learn Git Branching
Open SourceCheatsheets & Learning · Git & Version Control
Interactive visualization game for learning Git branching.
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Cheatsheets & Learning · Git & Version Control
Interactive visualization game for learning Git branching.
SSL & TLS · Security
Diagnose why Let's Encrypt certificate issuance fails for a domain.
Models & LLM APIs · AI for Developers
Open-source, multi-provider chat UI with agents and artifacts.
Models & LLM APIs · AI for Developers
Open-source LLM gateway: one API for 100+ providers.
Models & LLM APIs · AI for Developers
Open-source AI chat framework with plugins and agent marketplace.
Authentication · API Tools
Open-source auth infrastructure with a beautiful admin console — OIDC/OAuth, SSO and user management, self-hostable.
Logs & Metrics · Monitoring & Observability
Horizontally-scalable log aggregation designed like Prometheus.
Email · API Tools
Self-hosted email testing tool with a web UI, catches local mail.
Relational · Database
Community-developed MySQL fork with a permissive license.
MCP · AI for Developers
The open standard connecting AI models to tools and data sources.
Search Engines · Database
Fast, typo-tolerant search engine with great defaults (trending).
NoSQL · Database
The classic, simple distributed memory object cache.
Other Formats · Data Formats
Efficient binary serialization format, JSON-like but compact.
Dashboards & BI · Data & Analytics
Open-source BI tool for dashboards and self-serve queries.
Vector Databases · AI for Developers
Highly scalable open-source vector database for billion-scale search.
Object Storage · Database
High-performance S3-compatible object storage, self-hostable.
Models & LLM APIs · AI for Developers
European AI lab offering open and commercial models with an API.
NoSQL · Database
Popular document-oriented NoSQL database with a flexible schema.
SSL & TLS · Security
Generate recommended TLS configurations for many servers.
Relational · Database
Widely-used open-source relational database owned by Oracle.
Agent & LLM Frameworks · AI for Developers
Fair-code workflow automation with native AI agent nodes.
Queues & Streaming · Database
Lightweight, high-performance messaging and microservices bus.
NoSQL · Database
The leading graph database with Cypher query language.
Serverless & BaaS · Database
Serverless Postgres with branching and scale-to-zero.