Script Uploads / Downloads

Want to make a website where people can come and download any scripts which are available and also people can come and submit their scripts. Download will be free of cost and if a person is submitting a script, he/she will get paid for that script. Example: [login to view URL] (This is just an example. NO PART OF ANY WEBSITE SHOULD BE COPIED, STRICT POLICIES) Regards, Admin [login to view URL]