Free
Apache JMeter
Open SourceLoad & Performance · Testing
Classic Java-based load and performance testing tool.
loadperformancejava
Browse the complete directory — use filters to narrow down.
Load & Performance · Testing
Classic Java-based load and performance testing tool.
Queues & Streaming · Database
The industry-standard distributed event streaming platform.
Dashboards & BI · Data & Analytics
Powerful open-source data exploration and visualization platform.
Development Platforms · IoT & Embedded
The official Arduino IDE 2.x — autocomplete, debugging and board manager for the world's most popular maker boards.
CI/CD · DevOps
Declarative GitOps continuous delivery for Kubernetes.
UI Libraries · Frontend
Headless component library for React, Vue and Solid, powered by Zag.js state machines.
Screenshots · Image & Media
Record terminal sessions as lightweight, copy-pasteable text casts — embeddable and shareable.
Frameworks · Backend
Microsoft's cross-platform framework for web apps and APIs.
Frameworks · Frontend
Web framework for content-driven sites that ships zero JS by default.
Documentation Generators · PDF & Documents
Astro's documentation framework — fast, accessible docs sites with search, i18n and sidebar tooling built in.
Audio & Video · Image & Media
The classic open-source audio editor — multi-track editing, noise removal and effects for podcasts and voiceovers.
Authentication · API Tools
Open-source authentication for Next.js and other JS frameworks.
Animation · Frontend
One-function animation utility that adds smooth transitions to DOM changes — zero configuration.
Agent & LLM Frameworks · AI for Developers
Microsoft's framework for multi-agent AI conversations.
Ecosystem · CSS Tools
PostCSS plugin that adds vendor prefixes using Can I Use data.
Frameworks · Backend
Ergonomic, modular Rust web framework built on Tokio.
UI Libraries · Frontend
Headless React components from the Material UI team — unstyled primitives with strong accessibility.
Programming Languages
Official GNU Bash shell website with manual and downloads.
CLI Tools · Development Environment
cat clone with syntax highlighting and Git integration.
Authentication · API Tools
Framework-agnostic TypeScript authentication library (trending).
Build & Lint · Frontend
One fast Rust toolchain for linting, formatting and more (trending).
Offline Toolkits · Developer Utilities
A scriptable scratchpad for macOS with 100+ built-in text transformations — paste, transform, copy back.
UI Libraries · Frontend
The classic CSS framework with components, grid and utilities.
Icons · Frontend
Free, high-quality SVG icon library from the Bootstrap team with 2,000+ glyphs — works far beyond Bootstrap.