I use Xabber and I'm very happy with it: https://play.google.com/store/apps/details?id=com.xabber.android https://play.google.com/store/apps/details?id=com.xab

I use Xabber and I'm very happy with it: https://play.google.com/store/apps/details?id=com.xabber.android https://play.google.com/store/apps/details?id=com.xabber.and... But if I can't talk with my contacts using a Gmail account, then is not that useful.