ChronoChat-android is an Android chatroom app built on jndn and ChronoSync. Releases are available on Google Play: https://play.google.com/store/apps/details?id=net.named_data.android.chronochat.
For more information on NDN, visit http://named-data.net/.
For more information on the ChronoSync library used by this app, visit http://named-data.net/doc/ndn-ccl-api/chrono-sync2013.html.