MIDP

The Mobile Information Device Profile is essentially a Java subset that runs on mobile phones and PDAs.
It is currently being used (with great success) for downloadable games, for instance.

• Michael Powers’ MIDP for OS X Package
• MIDP on Mac OS X (MobileWhack’s notes)
• Emulator Round-Up
• MIDP Home
• MIDP for Palm and Palm OS devices, MIDP 2.0 Beta