I've just ported my runtime game engine to Linux and OS X with Freepascal + JEDI-SDL and it worked with a minimum of trouble!

Screenshots of my engine running on Windows, Mac OS X, Ubuntu Linux:




The combination of Freepascal+JEDI-SDL+VMWare makes cross-platfom development really possible for a single developer with a single PC
A big "thank you" to the FP/JEDI-SDL team!