We have covered Leap Motion’s Orion for VR a bunch of times here in the past. It has a hand tracking system with low latency and long range to provide you with a more immersive VR experience. With add-on modules, you can do even more with it.
The Detectors Module comes with a hand model with support for palm, finger tips, and arm actions, making it easy to attach game objects to a hand. You can also turn on/off game objects. More information is available here.