Default image viewer with advanced functionality: rotating, fitting, moving.
Moving the image with the mouse. Shortcuts: [R] - Rotate CW 90 degrees [Shift + R] - Rotate CCW 90 degrees  - Fit  - Fill  - Natural You can report bugs on https://github.com/Doliman100/Simple-Image-Viewer
- (2019-06-06) DCM: This is great, would be 5 stars if you had a simple ui with buttons so I don't have to remember the keys.
- (2019-12-30, v:1.0.3) Elisei Kulikovsky: Some points
Please add the ability to change the background color and shortcut keys. Also it would be nice to be able to switch zoom modes by clicking on an image (like in default image viewer), and to choose these modes (like only Fit and Natural). Also Fill mode (2) doesn't work for me.