Somebody asked about a free spreadsheet a day or two ago, but damned if I'm gonna dig through all this crap to find out who.
Anyway, I just came across two:
http://www.byedesign.freeserve.co.uk/http://www.ds.unifi.it/~stefanin/AGR_2001/SH/sssheet.htmIt's tough to find a standalone spreadsheet, as most of them are part of office suite packages, and then we're talking huge downloads and installations. Open Office is probably the best of the lot, though, if someone wants a free office suite.
Beware of the possibility of bugs in a spreadsheet program-- it's not unheard of for some of the functions to have errors, and scan for spyware after installing. I think these two are spyware-free, but it's a good habit to get into.
Beware also the lack of truly helpful help files in much freeware.