Free
MariaDB
Open SourceRelational · Database
Community-developed MySQL fork with a permissive license.
mariadbmysqlsqldatabase
Browse the complete directory — use filters to narrow down.
Relational · Database
Community-developed MySQL fork with a permissive license.
UI Libraries · Frontend
React components implementing Google's Material Design.
MCP · AI for Developers
The open standard connecting AI models to tools and data sources.
Documentation Generators · PDF & Documents
Create books and docs from Markdown, made by the Rust community.
Search Engines · Database
Fast, typo-tolerant search engine with great defaults (trending).
Clients & GUIs · Git & Version Control
Open-source visual diff and merge tool.
UI Libraries · Frontend
Headless, accessible Svelte component builders — behavior only, you bring the styling.
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.
Wallets & Infrastructure · Web3 & Blockchain
The most used self-custody crypto wallet — browser extension and mobile, with Snaps extensibility and dApp permissions.
Penetration Testing · Security
The most widely used penetration testing framework: exploit modules, payloads and post-exploitation.
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.
Package Managers · Development Environment
Polyglot runtime manager and task runner (modern asdf alternative).
Documentation Generators · PDF & Documents
Python static site generator for project documentation.
Unit & Component · Testing
Flexible Node.js test framework that pairs well with Chai.
API Mocking · API Tools
Easy, open-source tool to run mock REST API servers locally.
NoSQL · Database
Popular document-oriented NoSQL database with a flexible schema.
SSL & TLS · Security
Generate recommended TLS configurations for many servers.
Mocks & Fakes · Testing
Mock Service Worker: seamless API mocking for browser and Node tests.
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.
UI Libraries · Frontend
A complete Vue 3 component library with TypeScript, theming and a clean modern look.