Need trial of MS Excel or name of other spreadsheet!

I have an assignment due tomorrow for school. But MS Office is screwed up and I dont have the CD. So can I download a trial of Excel or something?
Also, is there another easy to use program like Excel. I just need to do a spreadsheet with advantages and disadvantages on different power sources (for anyone curious:p)

I need it fast please! (not trying to be rude):stuck_out_tongue: