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Routing Tree Web Toolkit

Fluent API for pleasant file IO

Noise Detection Ruby Script

(offically at github.com/sinatra/sinatra) Classy web-development dressed in a DSL

specify attributes within an ActiveRecord model that can be set but not modified

EVE Online Overview Generator

A command line tool that analyzes request logfiles (e.g. Rails, Merb, Apache) to produce a performance report.

A gem to easily create prefork servers.

CanCan extension with role oriented permission management, rules caching and much more

**Grit is no longer maintained. Check out libgit2/rugged.** Grit gives you object oriented read/write access to Git repositories via Ruby.

FFI wrappers for ICU. MRI extension with the dynamic C library.