Osw-android is a project mainly written in Java, it's free.
Onesocialweb android client
Android client for the onesocialweb project. Released under an Apache 2.0 License (see LICENSE). Copyright 2010 Vodafone Group Services Limited.
All documentation and tutorials available on http://onesocialweb.org
PLEASE NOTE! To avoid confusion, please use your own application name and icon if you are putting a modified app on the Android market.
Version 0.6 - Released May 27th 2010