All-in-one speedcubing app for Java-supported mobile phones
PJTimer is an open-source, all-in-one mobile speedcubing app, based on desktop speedcubing app like the CalCubeTimer(CCT) and Prisma Puzzle Timer and the web-based ones like the CubeTimer.com, CubeMania.org and qqTimer.net.
Tantrix board game and puzzles for J2ME and Android devices
With Tantrix ME, you can play Tantrix (www.tantrix.com) on your mobile device (cell phone, smartphone, tablet PC, ...) that implements the Java (J2ME) platform with at least MIDP 2.0 and CLDC 1.1 or the Android operating system!
Mobile Sudoku Solver is a Java (J2ME) application for solving, designing and playing Sudoku puzzle game on mobile devices. It can find all the solutions available and hold them all in memory. You can select one of them, edit and solve it again.