Hudson (build and continuous integration tool)

If you haven't seen Hudson (https://hudson.dev.java.net/), you should give it a look. I was introduced to it by Clay McCoy at Rubyham. After playing with it, I decided to switch from CruiseControl.Net to Hudson. The switch didn't take long. In all, I spent < 3 hours total to make the swtich (most was learning time). The setup was fast (~10min). Conversion from CC.Net wasn't hard. I'm very happy with the features of Hudson and it's plugins.