Turn off ARC for individual classes

It is possible to disable ARC for individual files by adding the -fno-objc-arc compiler flag for those files.

You add compiler flags in Targets -> Build Phases -> Compile Sources. You have to double click on the right column of the row under Compiler Flags. You can also add it to multiple files by holding the cmd button to select the files and then pressing enter to bring up the flag edit box.

OTA ad hoc distribution

http://iphonedevelopertips.com/xcode/distribute-ad-hoc-applications-over-the-air-ota.html

Apple push notifications

http://www.raywenderlich.com/3443/apple-push-notification-services-tutorial-part-12

http://www.easyapns.com/

Windows Phone reminders

http://msdn.microsoft.com/en-us/library/hh202965%28v=vs.92%29.aspx

Windows phone Page Transistions working

http://www.windowsphonegeek.com/articles/Windows-Phone-7-Navigation-Transitions-Step-By-Step-guide

Bing maps

http://msdn.microsoft.com/en-us/library/ff941093(VS.92).aspx

Windows Phone Jump List

http://www.windowsphonegeek.com/tips/wp7-working-with-xml-reading-filtering-and-databinding