WAkka (toolkit)
WAmazon Lumberyard
WAndroid Studio
WApache Flex
WBlueJ
WC3D Toolkit
WDecima (game engine)
WEclipse (software)
WEclipse Che
WIntel XDK
WIOS SDK
WMarmalade (software)
WMoSync
WNetBeans
WPyCharm
WQuickTime
WRen'Py
WSolar2D
WUnreal Engine
WVisage SDK