Recently, on a friend's mac I came across a wonderful application for plotting in numerous ways numeric data - DataGraph. I've always done this sort of thing with Excel, and with newer versions, to me (this is emphasized "to me", so this doesn't get taken as an Excel rant post), it's becoming troublesome.

Are there applications like this (specialized for one thing they do good and relatively simple ... I'm not interested in CFD visualization packages in here.) for Windows ? All suggestions welcomed.