The Hashery is a tight collection of Hash-like classes. Included among its many offerings are the auto-sorting Dictionary class, the efficient LRUHash, the flexible OpenHash and the convenient KeyHash. Nearly every class is a subclass of the CRUDHash which defines a CRUD model on top of Ruby's standard Hash making it a snap to subclass and augment to fit any specific use case.

Facets is the premier collection of extension methods for the Ruby programming language. Facets extensions are unique by virtue of thier atomicity. They are stored in individual files allowing for highly granular control of requirements. In addition, Facets includes a few additional classes and mixins suitable to wide variety of applications.

A priority queue is like a standard queue, except that each inserted elements is given a certain priority, based on the result of the comparison block given at instantiation time. Retrieving an element from the queue will always return the one with the highest priority.

Iteration is class that encapsulate an step in an each loop. It can be used to query infromation about an iteration easily.

Reusing makes it possible to use refinements without all the boiler plate normally necessary in their creation. Instead extension scripts can be loaded directly as refinements.

RomanNumeral class for working with roman numerals in a native form.

Rubytest is a universal test harness for Ruby. This gem provides the core library and a suite of common plugins making it a more convenient dependency for most use cases.

Smeagol is a customizable read-only Gollum wiki server. Smeagol makes it possible to maintain a standalone website, but update it through the Gollum wiki interface, e.g. via GitHub.