Ask HN: Which .NET applications might be (better) on Mac/Linux soon?

When I read about Microsoft open-sourcing .NET, my first thought were: Cool, finally Pain.NET might run on Mac OS X soon.

I'm not sure, whether my hopes are justified, but I bet there are quite a few nice applications out there that are on .NET and are either not at all available on Mac/Linux (Pain.NET) or with limited native support on Mono (e.g. KeePass).

Which .NET applications do you hope will get run (better) on Mac/Linux soon?