IK Constructor is a set of scripts – or inverse kinematic templates and each of them does its own thing. Every script can work right in the Unity Editor window without pressing Play button. Scripts can be stacked upon each other to form almost any kinematic chain you want.

Tutorials
Promo video and tutorials available Here

Documentation
Documentation available Here

Key Features
- Works in both Inverse and Forward kinematic modes
- Every node update requires a single computation cycle and works with absolute precision, very mobile friendly
- Various IK-templates can be stacked
to form more complex kinematic chains
- Every of multimple settings can be changed in real time
- Angle/Position transforming system
- Angle/Position limiting system
- Internal animation system
- Debugging visuals
- Can run in edit mode

Limitations
- IK Constructor does not contain a global solver system, so it can't drive very complex rigs.Multiple local solvers are used instead. Still, practice proves it is enough for the most of simple game designs. Also, additional scripting can enlarge area of application.
- All nodes under control must be of unit scale