ripl is a light shell that encourages common middleware for shells i.e. rack for ruby shells. It is also a modular alternative to irb. Like irb, it loads ~/.irbrc, has autocompletion and keeps history in ~/.irb_history. Unlike irb, it is highly customizable via plugins and supports commands i.e. ...

Ramaze is a simple and modular web framework

Olelo is a git-based wiki which supports many markup languages, tags, embedded TeX and much more. It can be extended through plugins.

Tux dresses up sinatra in a shell. Use it to interact with your helpers, view rendering and your app's response objects. Tux also gives you commands to view your app's routes and settings.

Extends Sinatra with Sequel ORM config, migrations, and helpers

Workarounds before ruby-core officially supports Proc#to_source (& friends)

xcres searches your Xcode project for resourcesand generates an index as struct constants.

Unicode support for hirb

High Performance and Optimized Preforked Rack Handler

Start an interactive session when a test fails

Datacenter Hypervisor

Datacenter Hypervisor

Haskell-style partial application and composition for Ruby methods

Unicode support for hirb

Ruby FFI bindings for the OSX Cocoa API

Drop-in image thumbnailing for your Rack stack.

Rack::URISanitizer is a Rack middleware which cleans up trailing % characters in request URI.

Automatically refresh your browser when a file has changed

Rspec and Bacon based BDD API for Ruby/EventMachine

Simple BDD API for testing asynchronous Ruby/EventMachine code