RuboCop

A modern, TipTap-based rich text editor for Ruby on Rails applications

A lightweight, high-performance predicate evaluation library for Ruby/Rails applications with automatic caching, TTL support

Metasploit Framework

Transactional email server with a lovely web interface

Free, open source mental health communication web app to share experiences with loved ones

The administration framework for Ruby on Rails applications.

OpenProject is the leading open source project management software for product, project and portfolio management. A powerful Jira alternative with agile planning, issue tracking, roadmaps, Gantt charts, time tracking, collaboration features, and more. Available on premises or in the cloud. ⭐Star us on GitHub

GitLab CE Mirror | Please open new issues in our issue tracker on GitLab.com

Open source, self-hosted error catcher for Rails apps, API-compatible with Airbrake so you can host your own error tracking.

Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape.

Open source DocuSign alternative. Create, fill, and sign digital documents ✍️

Free, open source full-stack web development curriculum covering HTML, CSS, JavaScript, and Ruby on Rails, built by and for the community.

Multithreaded, Postgres-based, Active Job backend for Ruby on Rails.

Ruby on Rails admin panel framework for quickly building internal tools and dashboards without writing repetitive CRUD views by hand.

The web application framework that powers this entire directory - convention over configuration, batteries included.

Fast, lightweight pagination gem for Ruby apps, designed to be simpler and more performant than older pagination libraries.

Self-hosted Beta App Distribution for Android, iOS, macOS, Linux and Windows apps | 开源自部署移动应用、 macOS、Linux 和 Windows 应用分发平台，提供 iOS、Android SDK、fastlane 等丰富组件库

Object-based search library for Rails that turns URL query parameters into ActiveRecord queries for building search forms and filters.

RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data

RSpec support for Ruby on Rails, providing request, controller, and view specs alongside Rails-specific matchers and generators.

Agentic harness to build rails applications.

System for building agents that perform automated tasks. IFTTT alternative.

One beautiful Ruby API for OpenAI, Anthropic, Gemini, Bedrock, Azure, OpenRouter, DeepSeek, Ollama, VertexAI, Perplexity, Mistral, xAI, GPUStack & OpenAI compatible APIs. Chat, Vision, Audio, PDF, Images, Embeddings, Tools, Streaming & Rails integration.