Main Features :
2D layers in AE become rigid bodies in Newton
Supports masks, text and shape layers
Handles collision, friction, bounciness, gravity and much more
6 types of body (static, dynamic, kinematic, AEmatic, dormant and dead)
4 types of joints (distance, pivot, piston and spring)
that allow you to connect bodies to each other with specific constraints
Provides clean, efficient and easy to use interface

Fast preview, fast export to keyframes
Comprehensive user's guide with illustrative animations for almost every property

Home Page - http://aescripts.com/newton/