In some cases we've been building tools that are specific to Linux for the desktop, and they only work on Linux, but I see two major projects that are wildly, wildly successful: Mozilla and OpenOffice, and those two programs are cross platform.
“There are certain things that Americans expect their government to do. Our infrastructure is vitally important. Putting people back to work with construction is important. Our roads, our bridges, our sewers, our waterways, our dams - this is what makes our country so special.”