The only one I have had any experience with is WindowShade. It brings back the OS 9 zipping up of the windows as well as some other tricks like minimizing in place and making windows transparent with different key combinations.
I forget that I have it installed and sometimes accidentally hit the key commands and make a window see-through.
http://www.unsanity.com/haxies/wsxNote that you will have to download an earlier version to use with 10.1 and I really don't know how many features it may have. I have the latest for 10.3.9 and up.
Oh, never mind. I see you upgraded to Panther.