Freeware Sciences and Math

Mathematics:

• OpenStat [???]



• Octave [GNU GPL]



• FreeMat [GNU GPL]



• Scilab



• Yorick
  
  
• Maxima [GNU GPL]



• wxMaxima [GNU GPL]



• SAGE



• Axiom



• SciCraft [GNU GPL]



• Yacas [GNU GPL]



• The R Project



• R Commander [GNU GPL]



• SciViews-R [GNU GPL]



• JGR (Java Gui for R) [GNU GPL]
• SciPy [BSD license]



• Rlab (no longer under active development)



• GAP [GNU GPL]



• MayaVi [BSD]



• PARI/GP [GNU GPL]



• Numerical Python [???]



• SalStat [GNU GPL]



• MacAnova [GNU GPL]



• Elmer [GNU GPL]

Biology:

• GROMACS [GNU GPL]



• GENtle [GNU GPL]



• ClustalX



• GeneDoc



• E-Cell



• Open Bioinformatics Foundation



• BioPython



• BioPerl



• BioJava



• BioRuby



• BioSQL/OBDA



• BioMOBY



• BioDAS



• Artemis [GNU GPL]



• PyMOL [Python License (CNRI Python License)]



• OpenRasMol [Other/proprietary GPL]



• Bioconductor [BSD or GPL]



• Staden [BSD]



• AGM View [GPL]



• AGM Build [GPL]

Geographic Information Systems:

• QGIS [GNU GPL]



• GRASS GIS [GNU GPL]



• MapServer [Mapserver License]



• GDAL [X/MIT style]



• OpenEV [X/MIT style]



• Thuban [GNU GPL]



• JUMP [GNU GPL]



• Virtual Terrain Project [VTP Software Licence]

Maybe there's more on the FreeGIS site, if you find stuff, please report it.

General:

• Celestia [GNU GPL]



• OpenUniverse [GNU GPL]



• Stellarium [GNU GPL]



• GNUPlot



• Walnut [GNU GPL/LGPL]



• CopperCore [GNU GPL]



• Gwyddion [GNU GPL]



• Virtual Moon [GNU GPL]