Best software for live chat

Hi All I am looking for a finish plug and play software for live chat. These software are most used for sex live chat. See bongocams,com [login to view URL], ect. Do you know which plug and play software is the best for live chat? * It should be 100% open, so it can be modified to me needs. I mean, features, and layout. * it should be a complete software, so I should not use all kind of small pieces. * It should be continuly developed from software supplier. I will give the project, and money to the one, who gives me the best reference for such software.