Kaminari is a Scope & Engine based, clean, powerful, agnostic, customizable and sophisticated paginator for Rails 3+

kittypedia - (auto-)generate and update pages on cattributes, traits, fancies (normal, exclusive, special editions) and more

kittyverse - helper classes for cattributes, trait types, traits, genes, genomes and more for cryptokitties and copycats

kittyverse-api - web client (helpers) for using the CryptoKitties unofficial (v0) and official (v1) public (HTTP JSON) APIs

kittyverse-graphql - (lite) web client (helpers) for using CryptoKitties (HTTP JSON) GraphQL APIs

Ruby framework for integration with Leadsquared. Leadsquared API: http://apidocs.leadsquared.com/

Wrapper around the C++ api for Leap Motion.

Ruby interface to the Leap Motion Controller (via SWIG)

Ruby interface to the Leap Motion Controller (via WebSocket)

Various tools for OTU clustering

This gem helps doing LEFT JOIN's between ActiveRecord associations

Taps for extracting metrics data and publishing to Librato Metrics

Generation next link_to-helper for Rails: Spiced with intelligence, and semantic beauty.

Another Logger

Generate blind texts and placeholder images with tons of options in Ruby, Ruby on Rails or Sinatra

Find where you are with CoreLocation!

Magento API libraries and other helpful Ruby code. For ruby 1.8.7

MagicEnum is a simple ActiveRecord plugin that makes it easier to maintain ENUM-like attributes in your models.

Mailcheck.js for Rails'

Convert mail to a one line log message.