You don't say just really what you want it to do? For example, general home office type stuff (word processor, internet)? Also what type of PC are you running it on?
I run a 450 MHz AMD K6, with 512MB RAM, and a 8MB graphics adapter - for regular home use, it runs BeatrIX
, which is based on Unbutu/Debian, and uses the Gnome desktop. It comes preloaded with very little, but still has Open Office (which I still find too heavy & have installed AbiWord), Firefox, Evolution (mail) and Gaim (plus a few others) It works a treat on such an old machine, and the desktop is as usable as any. I personally found the others, such as fluxbox, Icewm, xfce and the others a bit too basic (my 4 year old hasn't yet grasped right-click+menus & command line...