SQLite

Flexible authentication solution for Rails. The standard for user auth in Rails apps.

Kanban board tool from 37signals for tracking work visually across a team, built with the same simplicity ethos as their other products.

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

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

RSpec cheatsheet & Rails app: Learn how to expertly test Rails apps from a model codebase

Monitor performance of you Rails applications (self-hosted and free)

Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

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

Decorator/view-model library for Rails that keeps presentation logic out of models and views, in dedicated decorator classes.

Simple, first-party analytics library for Rails that tracks visits and events directly in your own database, no third party required.

An extendable Ruby on Rails CMS that supports Rails 6.1 to 8.1+ and Ruby 3.x to 4.x

Simple way to configure Rails apps using environment variables, keeping secrets out of version control.

⚡ A Scope & Engine based, clean, powerful, customizable and sophisticated paginator for Ruby webapps

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

Self-hosted music streaming server for playing your own audio library from any device, built as a Rails app.

Feature flag library for Ruby that lets you roll out features gradually, run A/B tests, and toggle functionality without deploying.

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.

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

A library for setting up Ruby objects as test data.

FriendlyId is the “Swiss Army bulldozer” of slugging and permalink plugins for ActiveRecord. It allows you to create pretty URL’s and work with human-friendly strings as if they were numeric ids for ActiveRecord models.

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

The tool to avoid various issues due to inconsistencies and inefficiencies between a database schema and application models.

Simple email-and-password authentication library for Rails from thoughtbot, focused on being easy to read and customize.

AASM - State machines for Ruby classes (plain Ruby, ActiveRecord, Mongoid, NoBrainer, Dynamoid)

Generate Entity-Relationship Diagrams for Rails applications

A tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.

Streaming replication tool for SQLite that continuously backs up your database to S3-compatible storage with point-in-time recovery.

The administration framework for Ruby on Rails applications.

Point-and-click annotation tool for Rails apps. Click any element, describe what needs to change, and your AI agent reads and acts on your feedback via MCP. Screenshots with drawing tools, kanban board, author attribution, and notification hooks.