Screen sharing application on Internet

We are looking for Screen share application on internet which facilitates anyone in an Office environment(on LAN having local IP & using corporate internet connection behind firewall) to access Host remote computer. I prefer to to have remote client software for Both Windows, Linux & macithosh environment. Please specify in detail your software development plan, Software design model as well as Physical infrastructure required to support the software. I have very short schedule to execute this work, so I will be interested to those who have already worked on it. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows Linux Macithosh