Smart Fusion Communicator

I need a smart communication platform similar to zoiper. Voice call, video call, group chat, report with google geolocation map (in form of email message). Apps must be expandable to handle more modules and API in future and source code given to us. Bidder must show evidence of similar app done before. Must be as fast as Zoiper. Developer will provide 6months support to fix issues. Cool and flashy interface. Language must be cross platform. It’s going to be windows, iOS and Android. Must be very secure