SelfAdjointView is an Android library that allows developers to easily let view change with the parent which can scroll. The animation contains one or more of parallax, alpha, scale.
RoundedLetterView looks like the one in Android 5.0 Contacts app.
Circle Time View is an android custom view for displaying time in a pretty format. The View is highly customizable, so you can adapt the appearance according your needs.
You can use this view to create countdown timers, alarms or just allow user to set time manually.
This library requires API level 8 or higher.