I had a magic moment this weekend when my wife and both of our babies were all asleep. I thought to myself "What should I do with this free time?". So, of course, I used it to make my first ColdFusion Builder extension, "Set IIS Root".
The extension allows me to right-click on any project or folder and set it as the web root in IIS directly from ColdFusion Builder. The functionality to do this was originally written by my friend, Jason Holden. Admittedly this is now only useful on flavors of Windows that have IIS, but don't allow multiple sites (Windows XP Pro, but not Windows 2003 or Vista), but I am in that group so it saves me time.
I was a little concerned about how difficult it would be to make an extension for ColdFusion Builder. It turned out to be really easy, taking me about an hour (or less) including the time to learn how to make an extension and to test it out. The ColdFusion Builder development team deserves major kudos here as do the authors of the documentation.