Real Time CHAT Software Required Using PHP/JAVA and MYSQL

Real time Chat Software Required Using PHP/JAVA and MYSQL We required complete real time Chat Software . I need desktop application working on Windows and MAC. For example,Please see this I need similar Application like these [login to view URL] [login to view URL] Note:You need to sign NDA Job Description: Your responsibilities: - Write clean, modular, robust code to implement the desired requirements with little or no supervision - Work with the QA and Customer Support teams to triage and fix bugs with rapid turnaround - Contribute ideas for making the application better and easier to use