Adobe has fired back to Apple's Aperture with a free beta version of a photo editing solution named LightRoom.
Since then, Apple decreased the price of Aperture, and corrected main bugs, making the solution more attractive.
But Adobe beta version of LightRoom is free... well maybe not for a long time as shown by this screen capture (in French):

It is the last window of an online poll organized by Adobe for a dedicated pool of its customers (aiming to evaluate if current or future prices of Adobe solutions will fit customers’ budget estimations for software updates).
One can clearly see the price of Adobe LightRoom 1.0: 369€.