I've been reading about porting Fandango to libSDL.That will ensure portability and reduce the window code size. The problem is, the fonts library depends directly on XLoadQueryFont.
SDL_ttf is technically a good way to substitute it, but looks like the quality is not as good. I like better the crisp fonts that are produced by glXUseXFont.
Advantages. Replacing the window/keyboard/mouse management code for something much cleaner. Better event handling (?). Easier potential port to Win32 or MacOS X.
Disadvantages. Requires an extra library. Using the current font code requires pulling font data on an unelegant and less portable (read: still requires xlib) way. Probable hidden porting issues.
That's just planning, I'm not doing any real work before the holidays end.