jfugue2me

It allows you to use JFugue-2.1 API to program music on MIDP 2.0, CLDC 1.1 compatible mobile devices.

It's easy to use, like this code to play C-major scale:

Player player = new Player();
player.play("C D E F G A B");

It's all based on JFugue-2.1 sources, so go to http://www.jfugue.org for more information.