Syck is an extension for reading and writing YAML swiftly in popular scripting languages. As Syck loads the YAML, it stores the data directly in your language's symbol table.

Note that although COPYING claims it is under BSD license, the actual text is MIT license....

Umple is a technology for model-oriented programming.

It can be used for pure UML modeling. Or it can be used to add UML constructs, such as associations and state machines to code written in Java, PHP, C++ or Ruby. It generates code in these languages that can save a large amount of programming effort and result in higher quality....

awesome gem hosting,

Buildr is a build system for Java applications. We wanted something that’s simple and intuitive to use, so we only need to tell it what to do, and it takes care of the rest. But also something we can easily extend for those one-off tasks, with a language that’s a joy to use. And of course, we wanted it to be fast, reliable and have outstanding dependency management....

An implementation of the Audioscrobbler plugin protocol, used to submit music playlist history to Last.fm.

A ruby wrap-up extension for the swiss ephemerides library (http://www.astro.com/swisseph/) used in astrology and astronomy domains.

Opscode's Chef cookbooks have been broken up into individual repositories:

https://github.com/opscode-cookbooks

Sup is a console-based email client for people with a lot of email. It supports tagging, very fast full-text search, automatic contact- list management, custom code insertion via a hook system, and more. If you're the type of person who treats email as an extension of your long-term memory, Sup is for you....

Instant Rails is a one-stop Rails runtime solution containing Ruby, Rails, Apache, and MySQL, all pre-configured and ready to run. No installer, you simply drop it into the directory of your choice and run it. It does not modify your system environment.

Watir automates web browsers. It allows you to write tests that are easy to read and easy to maintain. It is optimized for simplicity and flexibility.

Watir drives browsers the same way people do. It clicks links, fills in forms, presses buttons. Watir also checks results, such as whether expected text appears on the page....