The Autodesk Maya 2016 Extension 2 Developer Kit provides example plug-ins that demonstrate the use of Maya's C++, Python, and C# API interfaces.
Dynamics & Fracture Plugin
Particle Flocker is a particle-based flocking system integrated into Autodesk® Maya®
A Free Project manager browser and an online assets market tool for Autodesk® Maya®. A learning source and market place for assets.
Rigging plug-in for driving shapes based on tension.
Adds secondary motion to transform nodes.
Autodesk® Composite software is a node-based digital compositing and visual effects solution with advanced image processing capabilities.
Miarmy is the innovative, evolutionary and easy to use toolkit for Maya Crowd, behavioral anim, creature physics(PhysX) and render. Users: Dreamworks, Digital Frontier, Luma Pictures, Iloura Films etc