This gem provides the leaflet.js map display library for your Rails 5 application.

Prevent slow tests from creeping into your suite.

TutorialKit by StackBlitz, enhanced with Ruby on Rails support - Create interactive tutorials powered by the WebContainer API

Keep Your Hashes Classy (a lightweight Hash validation gem)

Flexible type system for Ruby with coercions and constraints

A Ruby implementation of an Event Store based on Active Record

Fixture-level performance without giving up FactoryBot-style test setup.

Ruby Tests Profiling Toolbox

200+ production open source Rails apps & engines in one repo. Search across real codebases with AI agents to research architectural patterns.

Type-safe properties stored in JSONB for ActiveRecord models. A modern, lightweight alternative to separate settings tables.

🎥 Make videos programmatically with React

The headless rich text editor framework for web artisans.

Ruby library for defining, generating and validating JSON Schema

Modern Ruby wrapper for FFmpeg with clean API and proper error handling.

ViewComponents for the Primer Design System

Code listings for the "Just Use Postgres" book

Content management the Rails way. A simple blog and CMS engine for Rails apps.

The Concise TypeScript Book: A Concise Guide to Effective Development in TypeScript. Free and Open Source.

A framework for finding JavaScript memory leaks and analyzing heap snapshots

Javascript Canvas Library, SVG-to-Canvas (& canvas-to-SVG) Parser

Calendar feed for The Golfer’s Journal 2026 Tour

Transferable Rails patterns and development philosophy extracted from 37signals' Fizzy codebase

A Roguelike Game written in vanilla Ruby

A vulnerable version of Rails that follows the OWASP Top 10

Ruby/ProgressBar is a text progress bar library for Ruby.

⚡️ 💾 Web Performance Snippets

Ruby on Rails Log Viewer