Fortin GCM Chat is a native Android based Chat Application, It uses Google Cloud Messaging as its core feature, It is super easy to customize, Chat Instantly and Get Push Notifications of The Individual and Group Chats.
Restaurant Finder is an Android app with PHP backend allows you to find popular restaurant near you. It have Admob support, FB, Twitter, Whatsapp sharing feature.
With ARForms User signup Add-on you can set custom user meta with registration form. That means you can set additional fields other than wordpress standard registration fields. You can select existing user meta as well as set new meta(s).