Facebook have launched their very own app store called 'App Center'. Fear not, Facebook are not trying to directly compete with the iOS app store or Google Play. The App Center is part of the official Facebook application and will send mobile users directly to their respective store fronts to download the apps.
The Facebook App Center can be viewed on web and mobile browsers, including iOS and Android Facebook apps. If you want to list a mobile app in the Facebook App Center your mobile app must use Facebook Connect.
Each app needs an app detail page to be featured in the Facebook App Center. You can upload images, provide full application details, and configure the permissions your app requires. Facebook recommends reading the guidelines to make sure your app detail page is not removed. According to Facebook...
“App detail pages that are eligible for the App Center will be reviewed prior to being listed and priority will be given to those apps that submit before May 18.”