LabPlot - LabPlot is a KDE-application for interactive graphing and analysis of scientific data.
DataMelt - DataMelt (DMelt), a free mathematics and data-analysis software for scientists, engineers and students.
SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.
Aveloy Graph - Aveloy Graph is an application for graph creation / data visualization
DPlot - DPlot graphing software lets scientists and engineers graph, plot, analyze, and manipulate data.
fx-Calc - fx-calc is an intuitive and easy-to-use software that enables scientists and students to calculate and analyze scientific and mathematical data and apply linear regressions to several data tasks.