Here’s a page supporting Cross-ELF, a library that runs graphical applications in Dos/Windows and of course Linux. The page is part of Cotting Software Productions, and you can find Cross-ELF examples as well as other programs there.
TDGraphics is another cross platform games development library which I found on Freshmeat.
It “allows programmers to write computer games which transparently run on Unix (X, DGA, GGI) or Windows (DirectX)”. I’ll be downloading a copy soon!
