We have 2 libraries with roughly the same capabilities in terms of input, but they have API designs and additional features which cater to the strengths & design patterns of their respective UI frameworks.
The video Taha linked to above shows off (in addition to how messy my desk is!) our ScatterView control which is flexible and easy to work with thanks to its integration with fundamental features of WPF like XAML, databinding, and element composition. Similar things can (and have) been built for other UI frameworks but the code required to use them tends to be significantly more involved.
On the other side of the coin, you have things like “Shadowbox” and “Water” which are more easily built in XNA thanks to its integrated support for custom pixel/vertex shaders. We have APIs in this library designed specificaly for easy integration with such custom shaders.