Particle Flocker 2.0
Particle Flocker is a particle-based flocking system integrated into Autodesk® Maya®, designed for both visual quality and ease of use.
Harnessing the power of Maya's dynamics systems, Particle Flocker utilizes a force field system, allowing animators to apply flocking behaviour to any particle-based system in Maya. Particle Flocker is one of the most versatile and yet easy-to-use flocking systems currently available for Maya.
Much more information, tutorial videos and documentation can be found at http://www.particleflocker.com
Note: This app uses a custom installer (and not the standard App Store installer).