Online graphics manipulation

We need our customers to be able to upload and manipulate graphics online. Kind of a Corel Draw for dummies. We'd like a vector graphic file to be the final output of a user's session. If possible, all graphics manipulation should be able to be done in real time. Ajax, Python and FreeBSD seem to be the solution. What can be done that will give our user's the easiest way to manipulate graphics and build designs online? Open to suggestions. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive 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 .Net preffered but we have heard that FreeBSD has advantages.