still, WinRAR is ace. Also, it is totally cross platform, you can get 'MacRAR' for mac, and 'rar' for linux (and i think it's open source too) MacRAR is graphical, and rar is console/text only, but is really easy to use, and all those versions are compatible with each other, although certain compression techniques used in more recent copies of the program may be unreadable if trying to open using an earlier version. (i am finding that my MacRAR is more recent than my WinRAR and is fucking it all up for me!)