Guitar Trainer is an application for mobile devices that helps musicians learn the fretboard of their stringed instrument thoroughly. It supports guitar, bass, banjo, ukulele, mandolin, and cavaquinho (in standard and alternate tunings). It includes a training mode, a game mode, and a tuner. It should work on any Java device supporting CLDC 1.1/MIDP 2.0.
Omnidic is a dictionary/translator for mobile phones.It works on mobile phones compatible with Java (MIDP 1.0 and MIDP 2.0). The program can contain several dictionaries at the same time. It is not necessary to connect to the Internet during use; the dictionaries are saved on the mobile device.