Xlstat is an office utility that adds itself as a plug-in to MS Excel, and which lets you from a spreadsheet in that program generate very complete graphic statistics, very detailed and professional, from the data in it.
The graphs can be both 2D and 3D. Xlstat also lets you generate a statistical analysis (both parametric and non-parametric), temporal series, regressions, etc.
Xlstat is a practical tool that is highly useful, above all if you often use MS Excel.