Unity Research

1 hour
Reading through articles on the net, checking out FPS Control and reviewing plugins with a view to build some tutorials for student for next semester when we launch into their massive 3rd person 3d game.
Stealth: (framework for Artificial Intelligence / enemies can track you if they see you - but you can outwit them by running away and hiding - Free)
http://unity3d.com/learn/tutorials/projects/stealth

FPS Control (framework to build first person shooter - free)
http://www.fpscontrol.com/?aff=assetstore

Probuilder:  Seemless level building tool - $95
It's like Hammer, CartStudio and 3dWorldStudio - a constructive solid geometry editor to allow users to build their scenes directly in Unity, with the ability to clone, model, light, bake shadows and texture.
http://www.probuilder3d.com

Mega-fiers
Various toolsets including morphing, terrain creation, lofting objects (racing, fences, roads and tank tracks) and scatter (easy environment object randomisation - trees, rocks etc)
http://www.west-racing.com/