If you work with Maya constraints a lot, you might want to have a look at Mehdi Farrokhtala’s Master Constraint tool.
Written in Python, Master Constraint Tool offers a way to streamline your workflow, housing all of the Maya constraints and their most used Flags all in one place. The tool also comes with 2 custom constraints, a surface constraint and a mesh constraint.
The Constraint workflow tool allows you to select multiple targets at once, and lets you add up and aim vectors easily. It gives you a nice and clean outliner without having extra nodes cluttering your scene.
Master Constraint Tool is offered as Freeware, courtesy of Mehdi Farrokhtala.