OpenSudoku is a simple open source Sudoku game. It’s designed to be controlled both by finger and keyboard. It’s preloaded with 90 puzzles in 3 difficulty levels, more puzzles can be downloaded from the web and it also allows you to enter your own puzzles.

Changes:

Export to sdcard
Theme support
Fixes issue #42 – Disable completed values – Can’t edit note when number button is disabled
Optional border around puzzle ( issue #7 )
Highlighting of cell and rows when touched by finger can be disabled ( issue #33 )
Swedish translation (thanks to possan2)
German translation (thanks to mhelff)

http://code.google.com/p/opensudoku-android/