Rocs is a Graph Theory IDE for designing and analyzing graph algorithms.
Gaphor
Gaphor is a UML and SysML modeling application written in Python. It is designed to be easy to use, while still being powerful
AlphaPlot
Mae AlphaPlot yn rhaglen gyfrifiadurol ffynhonnell agored ar gyfer graffio gwyddonol rhyngweithiol a dadansoddi data. Gall gynhyrchu gwahanol fathau o leiniau 2D a 3D (fel llinell, gwasgariad, bar, pastai, a lleiniau arwyneb) o ddata sydd naill ai'n cael ei fewnforio o ffeiliau ASCII, wedi'i fewnbynnu â llaw, neu gan ddefnyddio fformiwlâu.
PSPP
GNU PSPP is a program for statistical analysis of sampled data.
KmPlot
KmPlot is a program to plot graphs of functions, their integrals or derivatives.