Aligning subtools while dragging gizmo?

Might be a stupid question just because i cant find it, but maby someone knows the solution or the closest solution to aligning subtools from closest flat surface or edge while dragind the gizmo. just like in sketchup. or maby if there is a script/plugin for this. i have allready found the two allignement plguins but none of theese works with draging the gizmo.