Hi,
We have expertise in C programming to create Instant Messenger application, and we can create such application as you require. But it would be very helpful if you can elaborate a bit more bout your exact requirement and the features you are looking , which will be helpful for us to start and develop the application for you. We can develop this application and deliver to your full satisfaction. Also, post you give us more information, we can update the bid, increase/decrease, as per our negotiation. Please let us know more about what you are looking.
Regards,
Lanstrad Team