Simple Aim Constraint?

Anyone know of a quick way to apply an aim constraint to an object in Unity?

I’m hoping to find something similar to the way I apply them in Maya, where you just need to define an axis, target and up vector.
Any help or ideas would be very appreciated.

-Thanks

I usually use Unity - Scripting API: Transform.LookAt

Slap a script on your object and use something like

void Update()
    {
        transform.LookAt(target.transform, Vector3.up);
    }

Constraints.path-o-logical.com

A shameless plug, but it is what we use. It lets you use any axis, offers an optional up-vector target and the latest version runs live in the editor.