For this Service, I would create a custom PHP web app for your requirement. I can built it from scratch or even update the features or fix some bugs on your existing web app. It also includes working with Different APIs like facebook, twitter, nike+, youtube, tripadviser, etc. I can make CMS, CRM, Subscription Systems, Blogs, PayPal Integration, Portals built in CodeIgniter and mySQL. I prefer working on CodeIgniter for providing robust and high security apps. Thanks. Hiren