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.
Replicant (operating system) Replicant is a free and open-source operating system (OS) based on the Android mobile platform and aims to replace all proprietary Android components with free-software counterparts. It is available for several smartphones and tablet computers. It is written in the same programming languages as Android (as is forked from it, though indirectly), while the modifications are mostly in the C language, as the changes are mostly to the lower-level parts of the OS, such as the Linux kernel and drivers that use it.