saves the position of icons on the screen.
I guess this belongs in the "yet another" category but ...
1. Arrangements can be saved for each User.
2. Arrangements can be saved for each selected screen resolution.
I didn't test its portability; the Home Site states ...
"DesktopOK does not have to be installed and can be executed easily from the desktop,
and can be carried on a small USB-stick or other memory device. "
It's available from ...