Adobe Lightroom is one of the most popular image archive tools on the market, and beginning today, iPad-toting photogs now have an iOS app for their DSLR, smartphone and even tablet pics (gasp!) to call home. The companion application, Lightroom mobile, brings much of the desktop version's functionality to your portable slate. The touch-friendly interface, which supports both portrait and landscape orientations, swaps mouse clicks for taps and swipes. Flick up or down to pick or reject images, for example, or tap twice to cycle through metadata. Any changes you make to an image in the app will be pushed to the cloud and out to any other Lightroom apps that you've signed into. Similarly, if you edit an image on a desktop or laptop (which you'll want to do before making prints, since the iPad's display isn't calibrated), your changes will appear in Lightroom mobile within a few seconds.