More ideas from petr.jaro
I think i vise would need to be more secure than this, but i can think of several other things that this could be useful for.  And the could all slip into a single bench

Bench-Top Tool Storage Tip Build this slide-in base and mount the vise or tool on it so the entire unit can slide back in upside down and out of the way. Countersink holes into the underside of the base so you can recess the mounting nuts and washers.