Windows/Mac: AirPlay is an awesome way to stream music to your main stereo, but it only really works with iTunes. Airfoil streams any audio to your AirPlay devices, and it's on sale right now.
If you're listening to music through Pandora, Spotify, Winamp or other AirPlay-incompatible apps, Airfoil will let you stream it anyway. It's one of the best ways to make your entire home AirPlay-compatible, but it's usually a tad pricey at $US25.
In honour of their tenth anniversary, Airfoil developer Rogue Amoeba has a $10 discount on its entire library of apps, which means Airfoil becomes a much more enticing $US15. The sale lasts until the end of this weekend. Hit the link below to read more.