I have a lot of experience in facebook applications development. I have developed 400+ facebook applications using PHP, MySQL, jQuery, Javascript, AJAX, HTML5, Wordpress, Facebook API, etc. I can develop your 500 facebook apps in very less amount of time. I am also available for long term.
You can check my reviews to get an idea of quality of my work. Please discuss further so that I can start working on your project. Looking forward to hear from you. Thanks :)