Open source tools
1048 tools in our directory are listed as open source, from 30 sections: Frameworks (89), Open Source (82), UI & Components (80), Dev Utilities (55) and 26 more sections.
Tools
Etherpad
Open source real time editor that keeps full document history
Eva Icons
Open source UI icon pack with 480 icons for common actions
Fabric.js
Interactive canvas library with objects, text, filters and SVG
Falco
Open source runtime threat detection for containers and Kubernetes
fast-check
Property-based testing library for JavaScript and TypeScript
FastAPI
Python framework for building APIs with type hints and automatic docs
Fastify
Fast Node.js web framework with schema validation and plugins
fastlane
Open source tools to automate mobile app builds and store releases
FastMCP
Python framework for building MCP servers and clients
Feather Icons
Simple open source icons drawn on a 24x24 grid
Fider
Open source feedback board for feature requests and votes
First Contributions
A beginner guide to making your first pull request on GitHub
fish
Friendly interactive shell with suggestions and syntax highlighting
Flagger
Automated canary and blue-green releases for Kubernetes
Flagsmith
Open source feature flags with remote config and A/B tests
Flameshot
Free open source screenshot tool with built-in editing and annotation
Flask
Lightweight Python WSGI framework for web apps and APIs
Flatpickr
Lightweight JavaScript date and time picker with themes
Flexbox Froggy
A browser game that teaches CSS flexbox layout step by step
Flexprice
Open source billing for usage, credit and hybrid pricing
Floating UI
Positions tooltips, popovers and dropdowns on screen
Flowbite
Open-source Tailwind CSS components, sections and pages
Fluent Bit
Lightweight open source processor for logs, metrics and traces
Flutter
Build apps for mobile, web and desktop from one Dart codebase
Flux
Open source GitOps tool that keeps Kubernetes in sync with Git
Flyway
Version-controlled database schema migrations for many databases
Fontello
Web tool to build your own icon font from SVG files
Fontsource
Open source font library for self-hosting web fonts with npm
Forgejo
Self-hosted, lightweight software forge for Git projects
Formbricks
Open source survey and experience platform you can self-host
Formik
React library for building forms with validation and state
FormKit
Form framework for React and Vue with automatic data structure
Fossil
Distributed version control with built-in wiki and issue tracker
Framework7
Free framework for iOS, Android and desktop-style apps
Frappe
Open source framework and business apps like ERPNext and Frappe HR
Free Programming Books
Community-curated list of free programming books and resources
Fresh
Deno framework that server-renders pages and hydrates islands
FreshRSS
Self-hosted RSS and Atom feed aggregator with a web reader
Front Matter
Headless CMS inside Visual Studio Code for static site content
Fumadocs
React docs framework that runs on Next.js, Astro and more
Looking for something else? Browse the full directory.













































