We are looking for high performance virtual classroom software written in ASP.NET with complete source code with complete rights to modify it, use with multiple domains, without any water mark, integrate with our existing offerings without any royalty to be paid. The software should support at least 100 virtual class rooms concurrently. Student should be able to see the instructor and listen to audio. There should be an option which teacher can control to take the questions from students. The solution should work with teacher having 2 MBPS internet speed and student having 512 KBPS internet speed.