AirPlay
From LinuxMCE
Airplayer
Airplayer is a Python app, which can be used to receive video and picture streams via Apple's AirPlay.
It can be extended using MediaBackends. At the moment there are backends for XBMC, Plex and Boxee.
To utilize this in LinuxMCE, there need to be an Airplayer device for each Media Director / Output zone.
The source is available via the GitHub.
Others
Another bunch of software re AirPlay can be found here.