theme_park is a flexible multiple theme plugin for rails3, sinatra, and more...it's rack based

Add simple themes to rails applications

Rebuild of Lucas Florio Theme for rails Gem.

Rebuild of Lucas Florio Theme for rails Gem.

Flexible and modular validations for ActiveRecord models

Enable read-only mode on web services

Use thermite gems in Rails.

Bootstrap3 views for TheRole

Simple way to add Google analytics, universal analytics, uservoice, etc. to your rails app

Postmark configuration for Rails apps.

Thincloud Resque is an extraction of the New Leaders resque recipes packaged up as a Rails engine to manage dependencies and configuration.

Opinionated testing framework dependencies and configuration for Rails applications.

A Rails library that makes web apps lively while keeping all the logic on the server.

ThirdBase provides support for Rails to manage dual databases by extending ActiveRecord tasks that create, migrate, and test your databases.

Easy event logging for rails.

Create comments along with their threads on any commentable object. Use Ancestry gem.

A helpful tool for paralleling and asynchronous processing for Rails

The best Rails 4.2+ forums engine ever. Its goal is to be as simple and feature rich as possible. Thredded works with SQLite, MySQL (v5.6.4+), and PostgreSQL. See the demo at https://thredded.org/.

Adds support for images to be attached to a Thredded post (using Carrierwave)

thredded_resque adds resque, and resque-mailer support to thredded