Inversion of Control Containers and the Dependency Injection Pattern takes us deeper into the the world of dependency inversion.
Software optimization resources, this is a good place to start if you are curious about software optimization.
Running the Numbers, An American Self-Portrait, very interesting art work depicting various statistics related to the US society.
Our Top 40 Photoshopped Images, 40 examples of really mad image manipulation skills.
Elastic tabstops, A very interesting proposal which would allow the use of proportional fonts in programming IDEs without breaking alignment.
dotfiles.org, is a community for sharing dotfiles.
CruiseControl.rb, is Cruise Control implemented in Ruby. By default it builds by using rake but it can also use a simple shell script which means that it is real easy to adapt to other languages.