Miarmy

Miarmy is a crowd simulation plugin for Autodesk Maya to render scenes consisting of multiple moving software agents, or entities. The plugin is developed by the Hong Kong-based Basefount Software.
Miarmy is used by a number of major studios, including Dexter Digital, Disney Television Animation, Square Enix, Prasad EFX, CGCG Inc., Digital Frontiers, and Iloura.
Miarmy Express and Miarmy Professional.
Miarmy is available in two versions: Express (free) and Professional (paid). Sets of preset agents including models, textures, actions, and PhysX dynamic simulation are available for both versions for the following scenes:
Miarmy Express has the same feature set as the Professional version; however, its license is limited to non-commercial use and it only allows 100 agents to be rendered.