Design Contest Script Required

Design Contest Script required with full front and back end admin Few modifications need to be applied to the script if needed. I need something that is ready and has alot of good features also need something developed using opensource coding, something that is scalable, and can handle alot of users also easily modified by any developer. Please bid only if you do have the script ready and can show me demo, i will describe further details for the project with the right freelancer websites that i need to be similar: [login to view URL] or [login to view URL] or [login to view URL] My budget is not big for this so no over priced scripts please. Im looking for long term developer eventually for more projects so a good business deal must be conducted. Thanks