SoftMaker has a public beta of its PlanMaker spreadsheet for Windows Mobile based Pocket PCs available at its website.SoftMaker PlanMaker 2006 for Pocket PC Beta

The updated Excel Mobile in Windows Mobile 5 has a number of enhancements over previous versions including simple graphs. However, if you need even more functions and feature than Excel Mobile provides, you might want to take a look at PlanMaker 2006 in its Beta release form.