Govkit lets you quickly get encapsulated Ruby objects for common open government APIs. We're starting with Sunlight's Open States API and the Project Vote Smart API.

This gem add the "deep merge" feature to class Hash. It means that if you want to merge hashes that contains other hashes (and so on...), those sub-hashes will be merged as well. This is very handy, for example for merging data taken from YAML files.

Calculates the haversine distance between two locations using longitude and latitude. This is done using Math formulas without resorting to Active Record or SQL DB functionality

A simple way to add honeypot captchas to Rails forms

This gem keep an eye on every Net::HTTP library usage and dump all request and response data to the log file

Kaminari views for Twitter Bootstrap (rails engine)

If the user clicked through from an affiliated site, this middleware will track affiliate tag, referring url and time.

A modern fast tagging framework for Rails 3.1+

sheets allows you to store and browse snippets of text from your command line.

Load CSS and JS faster. Minifies, bundles, and optimizes CSS/JS assets ahead of time (e.g., on deploy), not at runtime. Loads popular third-party JS (like jQuery, YUI, and Dojo) from localhost in development, and auto-switches to Google's CDN in production. Lets you switch on LABjs mode to load more scripts in parallel. Can rewrite stylesheets to use CDN hosts (not just your web server) and cache-busting hashes for updated images.

Centralized logging for rails apps using MongoDB. The idea and the core code is from http://github.com/peburrows/central_logger

gcm_on_rails is a Ruby on Rails gem that allows you to easily incorporate Google's 'Google Cloud Messaging for Android' into your Rails application. This gem was derived from c2dm_on_rails (https://github.com/pimeys/c2dm_on_rails) after Google deprecated C2DM on June 27, 2012

Ruby bindings for LZ4. LZ4 is a very fast lossless compression algorithm.

Ruby API for Mercurial DVCS.

Ruby implementation of Naive Bayes that generates true probabilities per class, works with many token types, and provides lots of bells and whistles while being optimized for performance.

Use this gem to access New Relic application information via a REST api

Web page speed optimizations at the Rack level

Web page speed optimizations at the Rack level

ActiveRecord like interface for Amazon SimpleDB. Store, query, shard, etc. By http://www.appoxy.com

ZFS admin scripts, such as automatic snapshots, mysql snapshotting, scrubbing, etc.