You could try 'open office' its free has equivalent to Excel, I use MS Office but this is suposed to be OK.
OpenOffice.org is an open-source, multiplatform and multilingual office suite comparable with MS Office. It is compatible with all other major office suites and is free to download, use, and distribute. It was previously known as StarOffice before it became an open-source project. OpenOffice comes with OpenWriter - a word processor, OpenCalc - a spreadsheet and OpenImpress - a presentational package.