Airfoil

Airfoil, which is a $30 app for both Windows and Mac that will sync and stream audio from any source to AirPlay-compatible hardware.

Gizmodo Whitson Gordon 2011

Then I remembered I have a wonderful piece of software called Airfoil from RogueAmoeba.

Discussions: Message List - root 2009

except for Airfoil, which is a very buggy program in my experience

RaopX Streams Any Audio From Your Mac To Your AirPort Express | Lifehacker Australia 2010

Rogue Amoeba, makers of fine audio utilities for the Mac, such as Airfoil, Audio Hijack Pro, and Fission.

Macworld Aayush Arya 2009

And finally, if you have Airfoil on your computer (from Rogue Amoeba), you can use "Airfoil Speakers Touch" to stream any audio playing on you computer directly to your iPhone.

I'm all thumbs now (Jack Bog's Blog) 2009

Senator John McCain, with his wife Cindy, spoke with reporters after touring the Turbine Airfoil Design plant in Harrisburg, Pa. on Monday.

McCain, Supporters Slam Clark and Obama Campaign - The Caucus Blog - NYTimes.com 2008

Senator John McCain, with his wife Cindy, spoke with reporters after touring the Turbine Airfoil Design plant in Harrisburg, Pa. on Monday.

McCain, Supporters Slam Clark and Obama Campaign - The Caucus Blog - NYTimes.com 2008

And by the way if you have an airport express connected to your stereo you can stream Pandora using a shareware call “Airfoil”, which is a utility that allow you to send audio to your airport from any application.

The iPod as a Pandora’s box « Squash 2006

He'll first visit Turbine Airfoil Designs in Harrisburg, Pennsylvania, then setting his sights on manufacturing sheet metal facilities in Pipersville, Pennsylvania, where he will also hold a town hall.

CNN Transcript Jun 30, 2008 2008

Airfoil tells its clients that they usually can expect their local papers to mention an award in their business section.

Winning the Blue Ribbon 2007