Free
SQL Tools
Classic online tool for testing and sharing SQL queries.
sqlplaygroundsharing
Browse the complete directory — use filters to narrow down.
SQL Tools
Classic online tool for testing and sharing SQL queries.
SQL Tools
Popular open-source JavaScript library to format SQL in your apps.
ORMs · Backend
The Python SQL toolkit and ORM standard.
SQL Tools
Interactive lessons for learning SQL basics quickly.
SQL Tools
Free online SQL formatter and beautifier with many dialect options.
Relational · Database
Self-contained, serverless, embedded SQL database engine.
Penetration Testing · Security
Open-source penetration testing tool that automates SQL injection detection and exploitation.
SQL Tools
Interactive SQL tutorial with quizzes for beginners.
Compression & Optimization · Image & Media
Google's browser image compressor with advanced codecs (WebP, AVIF).
SSL & TLS · Security
Deep SSL/TLS server certificate and configuration analysis.
Agent & LLM Frameworks · AI for Developers
The classic browser UI for Stable Diffusion image generation.
Communities · Documentation & Learning
The largest Q&A community for programmers.
Markdown · PDF & Documents
Browser Markdown editor with Google Drive and GitHub sync.
Terminals & Shells · Development Environment
Fast, customizable shell prompt written in Rust, works with any shell.
PDF Tools · PDF & Documents
Self-hosted PDF toolbox with 50+ operations, locally run.
Build & Lint · Frontend
Industry-standard workshop for building, testing and documenting UI components.
Illustrations & Assets · Design & Prototyping
Freepik's library of customizable vector illustrations — recolor, animate and export for products and decks.
Headless CMS · Backend
The most popular open-source headless CMS, self-hostable.
Ecosystem · CSS Tools
CSS-in-JS library for React with scoped, dynamic styles.
Ecosystem · CSS Tools
The linter that keeps your CSS clean and consistent.
NoSQL · Database
Multi-model database with records, graphs and documents (trending).
Frameworks · Frontend
Compiler-based UI framework with no virtual DOM and great DX.
Compression & Optimization · Image & Media
Node.js tool and library for optimizing SVG vector files.
Compression & Optimization · Image & Media
Browser GUI for SVGO, optimizing SVG files with previews.