Business Standard carried this interesting article on competition for Tank Simulator. Indian firm Zen Technologies and Canadian firm CAE are in the race to supply 80 simulators for T-72 & T90 tank regiments. Russians who suplied those Tanks complained of IPR infringement.
Zen Technologies is a great Indian technology venture. They had put all their money on developing new products and I remember they operated from rented premises while developing their first major project `Small Arm Training Simulator' with partcial financial support from DSIR under PATSER. That product was a great success, hundreds of para military forces/ police improved their responses by training on the simulator. Their next project supported by DSIR is Simulator with 6 DOF - a technologically complex system and they did come with a successful model backed by patents.
The realistic environment they created for their simulator training is India specific , can be integrated with confidential terrain maps and must be a critical factor for users.
My vote is for Zen -the Indian Innovator