IE, Silverlight, Express editions of Visual Studio off the top of my head
I'm curious if Silverlight or VS actually caused any Windows sales. IE too, really; would someone who's not already running Windows actually switch to it for IE? Seriously?
But point taken; that it worked (or not) doesn't negate the fact it was done. Thanks!
They used to give away free copies of MS Office at Military conventions to senior personnel. The idea was that those people would start using the new default formats and others would be required to buy upgrades. It worked quite frequently that I know of.