Depending on what you want to accomplish, how about just starting with a generic spreadsheet program and add to it as your needs grow?

You can also do a Google search on freeware/shareware programs. There's a good chance you'll find someone else has written something similar to what you need. Due to lack of marketing skills, ambition, etc, it never made a commercial splash, and now it's free or asks a $25.00 registration fee.

Cheers, Mark