1)   Airfoil 2.0.2
With Airfoil, you can now send any audio right through your AirPort Express units. Use RealPlayer, WinAMP, and almost any other application with your AirPort Express.

 2)   Media Maestro LSX 1.0.5
Media Maestro LSX allows you to remotely control all the digital media stored in your PC library, iTunes or Windows Media Player, from any room in your home, using almost any current device with a web browser.