The Droidippy Android client.
Used to live at http://mtn-host.prjek.net/projects/droidippy/ (where you can also find the jDip version used by the server to adjudicate), so historical commits can be found there.
To build it you must create a file called local.properties containing the path to your Android SDK directory. In my case:
sdk.dir=/Users/zond/android-sdk-macosx
project.properties defines the SDK version to use when building it. Right now it is 17, but it should work with both older and newer version within reasonable limits.
To build a debug version, run ant clean debug. To build a release, you can modify release.sh and run that.
Comments, bug reports and patches are welcome.