SciDaVis
LabPlot
GnuPlot
OriginPro
RJS Graph
DataMelt
Matplotlib
GeoGebra
kdiff3
Beyond Compare
WinMerge
Meld
Araxis Merge
DiffMerge
P4Merge
Devart Code Compare
SciDaVis
kdiff3LabPlot - LabPlot is a KDE-application for interactive graphing and analysis of scientific data.
Beyond Compare - Beyond Compare allows you to compare files and folders.
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
OriginPro - OriginLab OriginPro is a comprehensive interface-based data management platform that allows users to calculate or visualize the data insights in various fields like engineering, scientific domain, or multi-sector industrial stats.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.