Pow. Right in the kisser.

To count records with string fields by regexps (To count records with numbers, use numeric-counter)

A set of adapters providing easy access to the GDS GOV.UK APIs

An implementation of the HyperLogLog set cardinality estimation algorithm in Ruby using Redis as a back-end

InfluxDB the Rails way

A dirt simple library for parsing and formatting human readable dates

A composable logging system built on the standard Logger library.

Plugin-able Memcached adapters to add features (compression, safety)

Open OnDemand core library that provides support for an HPC Center to globally define HPC services that web applications can then take advantage of.

Panda Client

Spice is a zesty Chef API wrapper. Its primary purpose is to let you easily integrate your apps with a Chef server easily. Spice provides support for the entire released Chef API

Visualize State Machines using GraphViz

A set of handy tools to upgrade your Rails application and keep it up to date

Easy split testing and feature flagging for Rails with TestTrack server

Build Xcode projects using Rake

Activity feeds backed by Redis

Generate 'Add To Calendar' URLs for Android, Apple, Google, Hey, Office 365, Outlook, Outlook.com and Yahoo calendars

Combined events calendar for Google Calendar, iCal, and friends.

Record the operation of a Ruby program, using the AppLand 'AppMap' format.

A simple gem that audit ActiveRecord models' attributes or methods by taking snapshots and diff them for you. Starting from scratch to work with Rails 3.2.2 onwards