Using US as the base layout, with a few quirks
- altgr+[ = å
- altgr+' = ä
- altgr+; = ö
- altgr+shift+[ = Å
- altgr+shift+' = Ä
- altgr+shift+; = Ö
To use on linux add the following to ~/.xinitrc
[[ -f ~/.Xmodmap ]] && xmodmap ~/.Xmodmap
and move .Xmodmap to your home directory.