Ruby on Rails

🌐 Jekyll is a blog-aware static site generator in Ruby

A deployment automation tool built on Ruby, Rake, and SSH.

A Ruby static code analyzer and formatter, based on the community Ruby style guide.

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

A library for setting up Ruby objects as test data.

Better error page for Rack apps

Object-based searching.

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

Catch unsafe migrations in development

Ruby toolkit for the GitHub API

🐬 Beautiful, performant feature flags for Ruby.

Profiler for your development and production Ruby rack apps.

General ruby templating with json, bson, xml, plist and msgpack support

One beautiful Ruby API for OpenAI, Anthropic, Gemini, Bedrock, OpenRouter, DeepSeek, Ollama, VertexAI, Perplexity, Mistral, GPUStack & OpenAI compatible APIs. Chat, Vision, Audio, PDF, Images, Embe…

~/.js

Your Rails variables in your JS

mini replacement for RMagick

Search Engine Optimization (SEO) for Ruby on Rails applications.

Ruby production code coverage collection and reporting (line of code usage)

Ruby file uploads, take 3

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

💼 Manage application specific business logic.

A Relational Algebra

Generates attr_accessors that encrypt and decrypt attributes

Easily and efficiently make your ActiveRecord models support hierarchies

Brings Rails named routes to javascript

Ruby JSON Schema Validator

The official gem for the Instagram API

DEPRECATED: As of sprockets-rails version 3.1.0, used in current versions of rails, this gem is deprecated