HHChaos 

Note: The ImageCropper is now included in the Windows Community Toolkit! The repo will no longer be maintained.

SvgConverter is a library for UWP platform to convert and display SVG files.

A set of MVVM tookit class libraries for uwp platform.

Eyedropper can pick up a color from anywhere in your application. Zoom in to see every pixel of color to choose from.

ChartCreator can generate custom style chart image(bar,line,pie) on the UWP platform.