Yeah, I noticed that as well, was just too lazy to edit my post. Thanks though. Did you happen to notice though, that the Qalculate has not been updated since 2009/2010 so it most likely isn't an active project? What I mean is this : you have a open-source project but no one maintaining it. If you ask me maintaining both the Qalculate and the CSSU would be too much to ask from developers. However, I'd like to see Qalculate, if it gets started again. But for now I think Speedcrunch, since it is an active project, would be a better option, for now that is.