Download Generic IK Free Unity. 

Note: Make sure to back up before upgrading

Generics IK offers a simple and easy to use IK solution for both Humanoid and non-humanoid models with special focuses on Humanoid rigs.

NEW in V1.2:
– Analytical Solver for 2 joints configs: to offer a quick, easy and effective IK for very common chains like Legs and Arms
– Leg Vertical Placement: Foot IK to place legs correctly on uneven surfaces and terrains