The program lets you create all sorts of different charts: two dimensional bar charts, pie charts and graphs, along with 3D bar and pie charts.
In addition to the graphs, you can create worksheets with hundreds of mathematical operations carried out in more than 4000 available columns. Other options include password protection for individual cells, and the quick inclusion of any charts or graphs.
GS-Calc is a pretty comprehensive tool that is a good alternative to many of the other spreadsheet editors on the market.
15 day trial version. Also adds watermarks to PDF printouts.