Georg Lukas

APRSdroid - APRS Client

Paid

Comprehensive APRS Client for Android Devices

Bruno the Jabber Bear (XMPP)

Free

Bruno is the cutest Jabber/XMPP Instant Messaging (IM) app available. It is a themed version of the open source yaxim app.

yaxim - XMPP/Jabber client

Free

Comprehensive Review of yaxim - XMPP/Jabber Client