Be sure to read the readme, Buuf.htm
Buuf is released under the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License. That means you don't have to ask permission to make non-commercial derivatives!
. Just make sure you give me credit.
I'm afraid I don't have time to make a Mac/Gnome/KDE/iconpackager/shellpatcher/pocketPC version, but feel free to do one yourself and share it
Archive is 7z...sorry.