Visual Subst - Create drive letters for folders
Extra subst - Extra Subst – program designed to make access to frequently used folders of your computer easier.
Win Subst - Win Subst is a free tool for Windows to substitute a drive letter to a local folder on the same computer, just like the old DOS subst command.
Psubst - Associates a path with a drive letter and extends the standard SUBST command allowing to create persistent substituted drives between startups