Free
Redux DevTools
Open SourceBrowser DevTools · Development Environment
Time-travel debugging for Redux — replay actions, diff state and trace dispatched updates.
reduxdebuggingdevtoolsextension
Browse the complete directory — use filters to narrow down.
Browser DevTools · Development Environment
Time-travel debugging for Redux — replay actions, diff state and trace dispatched updates.
Hosting & Collaboration · Git & Version Control
Browser extension with 200+ quality-of-life improvements for the GitHub interface.
Regex
Generate regular expressions from sample text matches.
Regex
Learn regular expressions step by step with interactive examples.
Regex
Visualize regular expressions as railroad diagrams.
Regex
Online regex tester with reference, cheatsheet and community patterns.
Comprehensive regex tutorial and reference for all flavors.
Frameworks · Frontend
Web-standard React framework merged into React Router v7.
Icons · Frontend
Open-source neutral-style system icon set with 3,000+ glyphs in outlined and filled styles.
Smart Contracts · Web3 & Blockchain
Browser IDE for Solidity — write, compile, deploy and debug contracts with zero local setup.
Tunneling & Debugging · API Tools
Open-source HTTP interception: modify requests, mock, and debug in browser.
References · Documentation & Learning
Official repository of Internet RFC specifications.
Web Analytics · Monitoring & Observability
Google's validator for structured data — check JSON-LD eligibility for snippets, breadcrumbs and products.
CLI Tools · Development Environment
Extremely fast, recursive line-oriented regex search tool (rg).
Courses & Tutorials · Documentation & Learning
Community-driven developer roadmaps, guides and skill assessments.
Build & Lint · Frontend
Module bundler optimized for libraries and tree-shaking.
AI Coding Assistants · AI for Developers
Community-driven AI dev agent for VS Code with multiple modes.
Build & Lint · Frontend
Fast Rust-based webpack-compatible bundler.
Programming Languages
Official Ruby language website with documentation and news.
Frameworks · Backend
Full-stack Ruby framework following convention over configuration.
CLI Tools · Development Environment
An extremely fast Python linter and formatter, written in Rust.
Programming Languages
Official Rust website: documentation, book, crates and tooling.
Ecosystem · CSS Tools
The mature CSS extension language with variables and nesting.
Programming Languages
Official Scala language site with documentation and downloads.