Set up a Mac the way I like it

In-depth guide to the best open-source typefaces: https://www.beautifulwebtype.com

Uber-simple Ruby refactoring in vim

Ssshhh. It's a secret.

Rails Generators for Cucumber with special support for Capybara and DatabaseCleaner

A desktop CNC milling machine.

Start SimpleSynth. Plug in a MIDI keyboard. Play.

Example of Rails 2.3 nested form attributes magic

A general-purpose Arduino shield for learning about Arduino hardware interfacing, or developing with Aiko.

Open-source (and open hardware) Arduino-based telemetry and instrumentation module for amateur rocketry

Test-driven sysadmin.

Simple framework for allowing Arduino applications / examples / libraries to be built in a modular, event-driven fashion. Aiko enables more events and less delay()s !

Less Ruby — now at http://github.com/cowboyd/less.rb

Little project to let people register to look after dogs for fun4paws.com.au

Get the power of ActiveRecord models, including validation, without having a table in the database.

RSpec-esque matchers for Test::Unit

Nice Objective-C wrapper around CoreMIDI. Makes it easy to deal with devices connecting and disconnecting.

A Rails plugin to help populate your database with data for tests.

Hook up MIDI software and hardware and pass MIDI data between them, applying assorted filters on the way.

the meta-sequencer

A simple ruby authentication solution.

Easy model creation/reference in cucumber - optionally leveraging your factories/blueprints

Run specs/tests multiple times through different gem versions

Fixtures aren't fun. Machinist is.

RSpec-esque matchers for Test::Unit