ShimmerLayout can be used to add shimmer effect (like the one used at Facebook or at LinkedIn) to your Android application. Beside memory efficiency even animating a big layout, you can customize the behaviour and look of the animation.
Xamarin.Android Bindings for Muhammad Norzariman Razari's Drawer-Behavior, an Android library that provide an extra behavior on drawer, such as, move view or scaling view's height while drawer on slide.
Xamarin.Android Binding for Hardik Dungrani's DynamicScalableSize. An android SDK that provides a new size unit - hsdp. This size unit scales with the screen size. It can help Android developers with supporting multiple screens.