A "facebook" style alert notification view lib
MBProgressHUD is an iOS drop-in class that displays a translucent HUD with an indicator and/or labels while work is being done in a background thread. The HUD is meant as a replacement for the undocumented, private UIKit UIProgressHUD with some additional features.
Cluster's reusable pre-permissions utility that lets developers ask the users on their own dialog for photos or contacts access, before making the system-based request.
