Unleash
Open source feature flags for releasing and rolling back changes
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.

Open source feature flags for releasing and rolling back changes



File uploads for developers with server-side auth checks

Free open source uptime monitor and status page on GitHub

Free, open source AI image upscaler for Windows, Mac and Linux


OpenTelemetry traces, metrics and logs in one self-hostable tool

Fast Python package and project manager written in Rust

Creates and manages reproducible virtual machines for development

Command-line prose linter that enforces your style guide in docs

Modular TypeScript schema library for validating unknown data

Open source key-value store for caching, queues and primary data


Server-side Swift framework for APIs, backends and websites

Isolated virtual Kubernetes clusters for tenants and AI platforms

Open source tool to collect, transform and route logs and metrics

High-level JSON grammar for interactive statistical charts

Open source tool to back up and restore Kubernetes clusters

Open source headless commerce for B2B pricing and company accounts

Free open source disk encryption for Windows, Mac and Linux

TypeScript toolkit for adding AI text and chat features to apps

Free self-hosted npm registry for private and cached packages

Kanban board for running and reviewing parallel coding agents

Open source time series database, compatible with Prometheus

Flexible Vite framework for server rendering and pre-rendering

Open source to-do and task manager with lists, Kanban and Gantt

Open-source code editor for writing, debugging and reviewing code

Low-level React visualization primitives from Airbnb


Fast Vite and Vue static site generator for Markdown docs

Open source system that scales MySQL with built-in sharding


Fast, memory-efficient engine for serving large language models

Tool manager that pins Node and JavaScript tools per project

TypeScript framework for AI agents with built-in observability

VS Code build from MIT-licensed source, with telemetry disabled

Official router for Vue.js with history modes and navigation guards

Progressive JavaScript framework for building web user interfaces

Vue component framework with Material Design styling

Open source Django CMS for flexible, editor-friendly sites

Free, open source app for saving web articles to read later

Open source full-stack framework for React, Node.js and Prisma


Open source terminal with file previews, an editor and AI

Open source XDR and SIEM for endpoints and cloud workloads

Open source vector database for search and AI apps

Framework-agnostic web components and CSS for any stack
Looking for something else? Browse the full directory.