This is a very simple RatingBar library, which you can just simply extend BaseRatingBar to implement your own animation RatingBar in a few steps!
TwoStageRate is a library to help you promote your android app by prompting users to rate the app after using it for a few days. Also its two stage process ensures higher reviews to go to play store while getting useful feedback on lower ratings.
AppRater is a library for Android designed to facilitate easy prompting of users to rate your app within the Google Play store or Amazon App Store. It won't prompt until at least 3 days or 7 uses of the app has passed and if the user chooses to rate later the count will start again.