Adobe-AIR-UDP-Socket-Native-Extension is a project mainly written in ..., it's free.
Native Extension for Adding UDP Socket Functions to Adobe AIR Application
Need Flex SDK + AIR 3.0 SDK for generating the .ipa (for iPhone/iPad)
To generate the native extension (.ane), run the 'package-yuco.bat' in folder 'UDP native Extension'
To use the native extension, compile the sample fla in folder 'UDP AIR package', then run 'package - yuco.bat'
*remember to replace your cert and profile in the bat file and change the App ID in the 'UDPExtension-app.xml' to match your profile