Improved support for models with nested attributes.

MongoMapper backend for delayed_job

Run tests, compile markdown/SCSS/etc, when a file changes

MDBM a very fast memory-mapped key/value store.

Raphael Radar is a JavaScript library to draw a controlable radar chart using Raphael.js, a JavaScript library to draw SVG

Flash messages for Rack applications implemented as middleware.

rewrite of the CoffeeScript compiler with proper compiler design principles and a focus on robustness and extensibility

Debugging toolbar for Rack applications implemented as middleware

A webhook middleware for the ifttt.com service

A patch that provides 'mail' gem with iso-2022-jp conversion capability.

Obsessive cheat sheet to favicon sizes/types. Please contribute! (Note: this may be in flux as I learn new things about favicon best practices.)

simple callback-based HTTP request/response parser

Emacs Got Git. This is a clone of Marius's excellent magit. Egg is an emacs interface to git.

Emacs Major Mode for Mustache

A request/response rewriting HTTP proxy. A Rack app.

Capistrano extension for tagging to git

Some sort of travel log.

AASM - State machines for Ruby classes

有明三日目のwebアプリケーション

git subcommand of browse/modify issue traker's tickets.

Vegas aims to solve the simple problem of creating executable versions of Sinatra/Rack apps.

Resque is a Redis-backed Ruby library for creating background jobs, placing them on multiple queues, and processing them later.

Confirmation for destructive Rails task.

Sapporo RubyKaigi 2012 Call for Proposals

Rake hooks let you add callbacks to rake tasks.

Track changes to your models' data. Good for auditing or versioning.

The missing package manager for OS X.

Small script to configure your hosts file so you don't get distracted during the day.