QtiPlot description

QtiPlot is a data analysis and scientific plotting.

QtiPlot is a data analysis and scientific plotting. Free clone of Origin.
QtiPlot uses Qt and the excellent libraries Qwt, GSL, QwtPlot3D and Ingo Berg's Fast Mathematical Parser.

SciGraphica

SciGraphica description
SciGraphica is a scientific data visualization and analysis application. It supplies many of the basic plotting features for 2D and 3D charts. It features opening several worksheets and plots to work with at the same time and PS output.
The libscigraphica libraries are the kernel of the program and provide all the widgets and dialogs, as well as the new plugin system.