It’s a brilliant little solution, especially if you shoot with a few bodies or hook up a variety of mass storage devices to your computer. And it’s free!
If you use a Mac, you’re likely familiar with the Image Capture application, which lets your computer know what to do when a camera is plugged in to your computer; open it with iPhoto or open it with Lightroom. That’s great, but what if you have a few different cameras? What if you have an iPhone (which has a camera that you may not regularly use) and every time you plug it in, Lightroom opens up? Cameras is a free application from Flexibits that installs a preference pane and lets your Mac distinguish between cameras to perform different actions for each of them.