One of the most prolific games of the BeOS platform was
SpaceGirl (later renamed to "No Gravity"). The game is now being ported to Windows and Mac OS X (using DX and, software GL and GL) and also it has been fully open sourced. Hopefully, we will see a Linux/Unix and a PocketPC port soon (for the 2700G Intel accelerator found on Dell or other VGA-capable PDAs, e.g. the VGA Zaurus).