CFAlertDialog is a library that helps you display super awesome dialogs on Android. It offers an adaptive UI support with tons of customisation options. This will save a lot of time for you.
An utility library for Android to run jobs delayed in the background. Depending on the Android version either the JobScheduler, GcmNetworkManager or AlarmManager is getting used.
Parallax Layer Layout let's you add layered parallax effect to your Android views or images based on things like device rotation.