Adobe Lightroom is one of two main tools we use for processing photos. (The other is Google Picasa.) Lightroom is a soup to nuts program that can manage all aspects of the workflow of a photo business. From PCMag.com's review:
Adobe's Photoshop Lightroom remains the gold standard in pro photo workflow software. It's a complete package, with top-notch organization tools, lens-profile-based corrections, local adjustments, and plug-in support.