Mortar / Flow / Dagger 2 requires to write a lot of boilerplate code. Auto Mortar is an annotation processor that focuses on eliminating the maximum of that boilerplate. No magic tricks here, just some straightforward and human readable code generated for you.
Deck is a beautiful view pager animation, and it looks like a deck.
EmotionRatingView library contains EmotionView, RatingView, and GradientBackgroundView
EmotionView - Displays an animated face that responds to a rating change.RatingView - Displays rating bar with animated grades.GradientBackgroundView - Displays a smoothly changing background with a gradient that responds to the rating change.