Photo Marker is a small AutoHotkey script that was written back in 2009 (?) to help a local photography club with the scoring of photos at their judging nights. Since then, I've done the odd bug-fix releases for them.
The functionality was tailored to their specific use case, but there is nothing in the code that would prevent others from using it.
The code is compiled into a Windows binary using the AutoHotkey Official compiler (Ahk2Exe)