1. Retouch-Photo2-UWPVector Graphics Editing Tool, you can transform, fill graphics, support layers, graphics combination.
2. FanKit-UWPThis is a cool UWP DeveloperTool that includes Brushes, Styles, Controls, ColorPicker, open source projects made with Win2d
3. Retouch-Photo-UWPSimple and free photo retouching tools,can transform,adjustment, shear,filling images,support layer,the selecti on. If you think that the PS is too complex might as well try.