I'm looking for a through-hiker's spreadsheet that's already got item categories filled in, so I can just go in and enter the weights for my convertible hiking pants, & c. Please, no recommendations for anything to do with Excel; I don't have it and don't want it. I can use OpenOffice Calc, or Google docs, or anything else that's free.

I'm not looking for anything fancy; I'm just hoping to save on a bunch of data entry grunt work. I figure this sort of thing has been done by plenty of people already, but so far all I've found is spreadsheets that require Excel.