Free
Solidity
Open SourceProgramming Languages
Official Solidity language site for Ethereum smart contracts.
solidityblockchainethereumsmart-contracts
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Programming Languages
Official Solidity language site for Ethereum smart contracts.
Frameworks · Frontend
Declarative UI library with fine-grained reactivity and no VDOM.
AI Coding Assistants · AI for Developers
Code search and intelligence platform; makers of Cody AI.
Clients & GUIs · Git & Version Control
Free Atlassian Git GUI for Windows and macOS.
3D & WebGL · Frontend
Browser-based 3D design tool with a friendly editor and a runtime for embedding interactive scenes on the web.
Frameworks · Backend
The Java ecosystem for building production-grade applications.
Frameworks · Backend
Opinionated Spring setup for standalone production-ready apps.
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.
SQL Tools
Browser-based SQL client that connects to many databases.
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.
Editors & IDEs · Development Environment
In-browser IDE running Node.js tooling entirely in WebContainers.
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.