WAladin Sky Atlas
WAutochem
WAutodesk Simulation
WAvogadro (software)
WBodyworks Voyager: Missions in Anatomy
WC.a.R.
WCartes du Ciel
WCircuiTikZ
WData Documentation Initiative
WDataScene
WDendroscope
WDirac (software)
WEarth3D
WEmacs Speaks Statistics
WField-Map
WGensim
WGetFEM++
WGEUP
WGmsh
WGravit
WHORTON (software)
WJME Molecule Editor
WMedCalc
WMocolo
WMolden
WMolekel
WMove (software)
WNesting algorithm
WNI Multisim
WOpenSim (simulation toolkit)
WPEBL (software)
WPolyworld
WPP3
WPraat
WPSF Lab
WQuickfield
WRhea (pipeline)
WRQDA
WScicosLab
WSigmaPlot
WSky Map
WSMath Studio
WSpectral modeling synthesis
WSplitsTree
WTI InterActive!
WUDig
WWaveSurfer
WWeBWorK
WWIEN2k
WWinplot
WWUHU (software)
WXplanet
WXyMTeX