There are lots of times when I'm playing the ukulele and I forget how to do a particular chord, or it's a chord I've never seen before. There's also lots of times I just want to show someone else the fingering for a chord that I do know, and after lots of acrobatics to make it easier to see, I normally revert to drawing it on a piece of paper.
I give you Chordophone - an application for Android that will show chord fingerings. It's extremely simple, just pick a chord from the list and it is displayed on a fretboard on the left.
All the source code is available here: http://code.google.com/p/chordophone/
The project also served as an experiment in how to get an application available on the marketplace. So grab your camera and scan this to go right to the download page: