Adobe:

Adobe announced the availability of Adobe Photoshop Lightroom 4 software for Mac OS and Windows. First released as a public beta in January 2012, the final version of Lightroom 4 is now available for US$149 for the full version and US$79 for the upgradeAccording to Adobe, “Lightroom 4 introduces refined technology for superior shadow and highlight processing, ability to create photo books, additional local adjustment controls, and enhanced video support.”