The AForge.Vision library contains some computer vision classes - set of motion detection algorithms. Full list of features is available on the project's web site.
Detect Motion Sensors Vector Value changes for: Accelerometer, Gyroscope, Magnetometer. Across iOS, Android, Windows Phone and Windows from a single API.
C# Animations based on actionscript "Tween" and "Motion" classes includes Robert Penner's easing functions
Sample: https://github.com/Rmanaf/TransitionsSample
Monolith4 is a Windows UWP library that lets you create animations in codebehind in a fluent, somewhat straightforward manner. It's a wrapper around the Windows.UI.Xaml.Media.Animation library that removes as much of the setup as possible.