Find a needle (a document or record) in a haystack using string similarity and (optionally) regular expression rules. Uses Dice's Coefficient (aka Pair Similiarity) and Levenshtein Distance internally.
Practical Natural Language Processing done in Ruby.
Columnar store for analytics with PostgreSQL. Check out the mailing list at https://groups.google.com/forum/#!forum/cstore-users.
A Ruby gem to handle all things zipcode.
ThinkingSphinx + Resque delta indexing.
AWS-S3 is a Ruby implementation of Amazon's S3 REST API
NOT ACTIVELY MAINTAINED Rails adapter for Carmen (provides country_select and subregion_select)
Client for Imagga image analytics services
Rails 3 Compatible Gem port of plugin
ActiveRecord plugin for versioning your models.
Adds the ability to normalize attributes cleanly with code blocks and predefined normalizers
Ruby wrapper for the ProductWars.com API
Ruby: RPXNow.com user login/creation and view helpers Facebook, Twitter, Google, MSN, OpenID, MySpace, Yahoo -- All in One