Facebook launched the App Center with more than 600 social apps, including Nike+ GPS, Ubisoft Ghost Recon Commander, Stitcher Radio, Draw Something, and Pinterest. It is now available on Android, iOS as well as Facebook.com.
You can also send apps you find on your computer to your mobile device using the new “Send to Mobile” feature. If a mobile app requires a download, you’ll be sent to install it from the Apple App Store or Google Play.
Source:- Facebook App Center