[WorldMaker]

There was a brief window where mono was in the default Ubuntu distribution along with several mono-powered open source Linux productivity and media applications such as Banshee (media player), F-Spot (photo manager), at least one note taking app, and probably at least one more application I'm forgetting.

There's a parallel world out there where the Gnome project and Linux distributions rallied around C# as a strong way to write applications, instead of the weird backlash/demonization they all soon received that ended such a brief "golden age".