Gloop Zero
Palm OS/Zodiac: Palm (Hi-Res 320x320) | Palm (Hi-Res+ 480x320) | Tapwave Zodiac (Enhanced 480x320)
Windows: x86 (Windowed 480x320)
Linux: x86 (Windowed 480x320)
Pocket PC: Windows Mobile 2003 or later (QVGA 320x240)
Simplicity
Palm OS (Hi-Res 320x320)