rucola

Rucola is a light weight framework that helps you write RubyCocoa apps. It allows you to build, test, and deploy applications using rake commands, eliminating the need to use XCode for the most common tasks.

APIdock

APIdock is a web app that provides a rich and usable interface for searching, perusing and improving the documentation of projects that are included in the app.

GCDrawKit

Flexible and powerful architecture for vector drawing applications

aptiva / activerecord

An objective-C implementation of ActiveRecord