Looking for a new Killer Application / the next big web application

I am Looking for a new Good web application that solves a problem or have a new advantage to an existing solution, I am open to any product that can be sold on the net, please only good application or websites, Proffesional look and a good presentation is non negotiable thanks ## 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) Complete ownership and distribution copyrights to all work purchased. ## Platform any ## Deadline information Most have a very good look and presntation with a good solution