CodeRunner is a framework for the automated running and analysis of simulations. It automatically generates any necessary input files, organises the output data and analyses it. Because it is a modular system, it can easily be customised to work with any system and any simulation code. One of its greatest strengths is that it is independent of any one simulation code; thus it can easily plot and compare the data from different codes.

Validate an entry that will be used in crontab

Crudify is a dynamic resource controller for Rails 3. The idea is skinny controllers with powerful hooks for easy customization.

Resource for looking up NAICS and SIC codes

CSI

Cubicle provides a dsl and aggregation caching framework for automating the generation, execution and caching of map reduce queries when using MongoDB in Ruby. Cubicle also includes a MongoMapper plugin for quickly performing ad-hoc, multi-level group-by queries against a MongoMapper model.

Generate the SQL to insert a single record and all of its dependencies

Use migrations and simple syntax to manage constraints in PostgreSQL DB.

Basic functionality for connecting and making requests on EPP (Extensible Provisioning Protocol) servers

Ernicorn is a BERT-RPC server packaged as a gem.

A fast, micro-framework for Ruby that should be run under EventMachine servers (thin)

Firewool blocks and allows IPs to your controller actions.

foursquare-api is a Ruby wrapper for the new Foursqauare V2 API

Gem to parse the utmz, utmb and utma tracking coockies used by Google Analytics.

Make existing code into a gem, without any fuss.

Query the MaxMind GeoIP data records via a web service

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

A Ruby interface to Gmail API (NO IMAP, NO SMTP). Search, read and send multipart emails; archive, mark as read/unread, delete emails; and manage labels. Everything is done through the Gmail API without going through IMAP or SMTP Protocol

Gopher2000 is a ruby-based Gopher server. It is built for speedy, enjoyable development of all sorts of gopher sites.

Wrapper for the Groupon API