Xabber is available on the Android Play Store and another software repository that contains only apps that are what ?
Xabber Xabber (from XMPP and Jabber) is a XMPP client for the Android Operating System. It is developed as an open source Project on GitHub and is licensed under the GNU/GPL v.3 license. The original developers are from a software company called Redsolution, Inc. Xabber is available on the Android Play Store and on F-Droid.
Android Developer Lab Android Developer Lab is a series of mobile software development-focused events around the world held annually by Google. They include bootcamps and technical sessions focused on Android and give participants an excellent chance to learn about the state of the Android platform, get hands-on with the latest version of the SDK, test applications on the latest sample Android devices, get questions answered by Google engineers from the Android team as well as meet other like-minded members of the local Android developer community.