This is a paid asset, but now you can download IK Plus Free.
Detail this asset from Unity Store: Original Link
IK Plus v0.3 (Latest version)
IK Plus is an easy to use, yet advanced IK system that allows you to create realistic character movements with very little effort. It enables you to make your characters interact with the environment in more believable ways.
IK Plus has been developed with the end user in mind, featuring organized and readable interface, easy to use script access functions and optional modules which you can add depending on the purpose of your IK.
Most importantly, IKP works with Unity FREE!
– Upper Body
– Lower Body + Grounder
– Weapon Collision
– Editor Simulation
-Graphical bone assignment assistant
-Hands correction functionality for the upper body module (DONE)
-Improved weapon aiming
-[Asset Upgrade] full third person IK-enabled character controller
-Editor simulation (DONE)
As this is an alpha release some unexpected bugs might occur. Support e-mail: [email protected]