exchange_rates is a gem that allows currency conversion and rate history tracking.

Generates a classes (or class like things) that can translate currency values in a specific currency to a number of other currencies. Other currency sources and new formats can be added.

Gem to retrieve exchange rates from the Polish National Bank (NBP)

Parse citations

Add GPS exif tags to images/videos based on a kml file

Library to work with Exlibris' Primo discovery system. Does not require Rails.

CMS engine to deliver multiple sites. Based on Mongoid.

Allow Ruby programs to easily access the ExploreCourses API

Exportable will help you in exporting ActiveRecord models in to different output formats including CSV, XLS etc.

Ruby tools for harvesting ISO EXPRESS data models.

extract grouped data from XML or HTML

A Ruby library for extracting data from websites and web based APIs. Supports most common document formats (i.e. HTML, XML, CSV, and JSON), and comes with a handy mechanism for iterating over paginated datasets.

Uses HTTP.rb to scrape extraspace.com.

Search Extratorrent for torrents and magnet links

Client for exporting Extreme Overclocking's Folding@home data

Ruby API for ex.ua

Miscellaneous EY server utilities

Put your app icon in the google play search. Is it easy to find?

Eyeliner puts CSS makeup on your HTML emails.

easy web framework