Free
SQLAlchemy
Open SourceORMs · Backend
The Python SQL toolkit and ORM standard.
pythonormsql
Browse the complete directory — use filters to narrow down.
ORMs · Backend
The Python SQL toolkit and ORM standard.
Penetration Testing · Security
Open-source penetration testing tool that automates SQL injection detection and exploitation.
Compression & Optimization · Image & Media
Google's browser image compressor with advanced codecs (WebP, AVIF).
Agent & LLM Frameworks · AI for Developers
The classic browser UI for Stable Diffusion image generation.
Terminals & Shells · Development Environment
Fast, customizable shell prompt written in Rust, works with any shell.
Build & Lint · Frontend
Industry-standard workshop for building, testing and documenting UI components.
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.
Frameworks · Frontend
Compiler-based UI framework with no virtual DOM and great DX.
Compression & Optimization · Image & Media
Browser GUI for SVGO, optimizing SVG files with previews.
Build & Lint · Frontend
Rust-based TypeScript/JavaScript compiler used by Next.js and friends.
Programming Languages
Official Swift.org open-source project site with docs and downloads.
State & Forms · Frontend
React Hooks for data fetching with caching and revalidation.
Frameworks · Backend
Mature PHP framework and set of reusable components.
References · Documentation & Learning
The most-starred system design study guide — scalable architectures, trade-offs and exercises, free and open source.
Icons · Frontend
Over 5,800 free MIT-licensed stroke SVG icons with consistent 24px grid and packages for every framework.
Mobile UI Libraries · Mobile Development
UI and styling toolkit for React Native and web from one optimizing compiler — fast, themeable, typed.
State & Forms · Frontend
Headless utilities: TanStack Query, Table, Router, Form and more.
Data Viz & Charts · Frontend
Headless UI table/grid logic for React, Vue, Solid and Svelte — you own 100% of the markup and styling.
Desktop Apps · Frontend
Build tiny, secure desktop (and mobile) apps with any web frontend.
Practice & Challenges · Documentation & Learning
Free, curated interview prep: algorithms study plans, behavioral questions and resume advice by ex-Facebook engineers.
Unit & Component · Testing
Throwaway Docker containers for reliable integration tests.
Unit & Component · Testing
Test UI the way users interact with it; simple, complete bindings.
Courses & Tutorials · Documentation & Learning
Free, open-source full-stack web development curriculum.