Large collection of useful Rails 3.1 helpers for SEO, Metatags, Facebook OG tags, integration for analytics services like google, woopra, olark, mixpanel and much much more...

Geo calculations in ruby and javascript

Get IP and location data using freegeoip.net - can also calculate of distance between map points using haversine supporting multiple distance units

Allows for easy parsing of Strings, Hashes and Arrays into a GeoPoint with lat/long

Easily convert between different distance units such as kms, miles etc.

For those that use Kanban or Scrum and want to print their cards so they can stick em on the wall

Code presentation tool using git

A Ruby library for limiting the number of times a method can be invoked within a specified time period.

A tiny gem that makes using Google Translate v2 API trivial

SKK Server which uses Google CGI API for Japanese Input

Because Blogojevich would be too tough to remember. It's a pluggable blogging system for Rails 3.

GS2 is a gyrokinetic flux tube initial value turbulence code which can be used for fusion or astrophysical plasmas. CodeRunner is a framework for the automated running and analysis of large simulations. This module allows GS2 (and its sister code AstroGK) to harness the power of the CodeRunner framework.

A simple way to grab recent activity on a given model grouped by hour, day, week or month (time series). Supports "padding" for intervals without activity.

This gem adds a helper and generator to facilitate the use of Head JS in your Rails 3 projects the same way you would normally add javascript tags using Rails default helpers.

Simple Heatmap generator in Ruby. (Requires ImageMagick)

Ruby port of Igo Japanese morphological analyzer. Igo-ruby needs Igo's binary dictionary files. These files created by Java programs. See: http://igo.sourceforge.jp/

Simple utility to pull image urls from web page

An edit-in-place gem that uses the JEditable jQuery plugin to post updates to the server via AJAX.

kindai.rb is kindai digital library downloader.

Linnaeus provides a redis-backed Bayesian classifier. Words are stemmed, stopwords are stopped, and redis is used to allow for persistent and concurrent training and classification.