SideBySide is a simple application that allows you to put 2 Photos side by side, for whatever reason you need to put two photos side by side, Pressing "F" will allow you to go full screen and move the photos with your mouse just hold and drag, then press "F" again to exit fullscreen
Why do you think that https://github.com/HassanSajjad-302/HMake is a good alternative to SideBySide