Free
pgAdmin
Open SourceGUI Clients · Database
The most popular open-source administration GUI for PostgreSQL.
postgresguiadmin
Browse the complete directory — use filters to narrow down.
GUI Clients · Database
The most popular open-source administration GUI for PostgreSQL.
Relational · Database
Open-source vector similarity search extension for PostgreSQL.
Frameworks · Backend
Productive Elixir web framework with realtime channels.
Programming Languages
Official PHP website with language documentation and downloads.
Ecosystem · CSS Tools
Minimal classless CSS framework — semantic HTML instantly looks clean and responsive.
Package Managers · Development Environment
Fast, disk-efficient JavaScript package manager with strict dependencies.
Serverless & BaaS · Database
Open-source backend in one file: SQLite database, auth, realtime and files.
Containers · DevOps
Daemonless, rootless container engine, Docker-compatible CLI.
Notebooks & Data Science · Data & Analytics
Blazing-fast Rust-based dataframe library for Python and Rust.
Stock & Placeholders · Image & Media
Thousands of free low-poly 3D models (CC0/CC-BY) with a searchable gallery and a Google-Drive-like library.
Penetration Testing · Security
Free, in-depth web security training with interactive labs, maintained by the Burp Suite team.
Ecosystem · CSS Tools
Tool for transforming CSS with JavaScript plugins.
Programming Languages
Official PowerShell documentation from Microsoft.
Build & Lint · Frontend
Opinionated code formatter supporting many languages.
UI Libraries · Frontend
The Angular edition of the Prime suite: 90+ components with a standout data table.
UI Libraries · Frontend
The React edition of the Prime suite: 90+ components, theming presets and a powerful data table.
UI Libraries · Frontend
Rich Vue UI suite: 90+ components, themed presets and a massive data-table implementation.
Logs & Metrics · Monitoring & Observability
The standard open-source metrics collection and alerting toolkit.
Agent & LLM Frameworks · AI for Developers
The most comprehensive open guide to prompting techniques.
Agent & LLM Frameworks · AI for Developers
Open-source tool for testing and evaluating LLM prompts and models.
Other Formats · Data Formats
Official Protocol Buffers documentation from Google.
E2E & Browser · Testing
Node.js library to control Chrome via the DevTools Protocol.
Unit & Component · Testing
The de-facto testing framework for Python: plain asserts, powerful fixtures and a rich plugin ecosystem.
Programming Languages
Official website and documentation for the Python programming language.