Desktop Customization - Reviews and free downloads at Download.com
Here's a link to a lot of freeware for vista that does that, just a little searching bring a lot of results, just test them out for yourself, for me if I'm going to use something that wouldn't crash, id make sure i had a lot of CPU and ram power because this uses up a lot of space. Although not a lot of hard drive space.
So sacrifice power for looks, really isn't my thing. In fact if it wasn't for a few things in a GUI that i like, id probably just run command line lol. Definitely go by the ratings on the page, and read others results.