MonkeySupport monkeypatches some of the performance-sink parts of rails with speedy C extensions.

A ruby library for reading and writing arbitrary messages in DJB's maildir format

Allows Nokogiri objects to be converted to PLists

Merge multiple PDFs in to one using iText's PdfCopyFile.

Port of the old, venerable ActsAsTree with a bit of a twist

Use jQuery's autocomplete plugin with Rails 4.

ActiveRecord-like associations for ActiveResource

Ruby bindings for Snow Crash

Robokassa is payment system, that provides a single simple interface for payment systems popular in Russia. If you have customers in Russia you can use the gem. The first thing about this gem, is that it was oribinally designed for spree commerce. So keep it in mind.

RubiGen - Ruby Generator Framework

A simple to use, yet powerful Ruby framework for building console-based applications.

Data mining and machine learning algorithms for JRuby

This is a Ruby API for Fitbit.com, currently scraping, but soon will use the officail API (when released)

ScheduleFu allows scheduling events with dates and times. It includes both the model and view portions of a calendar. It borrow heavily from acts_as_calendar (http://github.com/dball/acts_as_calendar) and calendar_helper (http://github.com/topfunky/calendar_helper).

Create and manage complex screen sessions easily.

Serious is a simple, file-driven blog engine inspired by toto and driven by sinatra with an emphasis on easy setup

Integrate SimpleCov results into Atlassian Bamboo CI server

SocialPoster is a gem that allows you easily post to different social networks.

Spree Redirects adds an interface for redirecting old url's to new ones.

This gem (spree extension) provides support for multiple suppliers in one store. Products should be assigned to the supplier that they belong to, which allows you to select a supplier and view only their products. Suppliers can be associated with Taxons that allow the customer to search for suppl...