First of all, I'm not a photographer...I'm just looking for an easy way to tag and organize thousands of family photos using keyword metadata. Requirements are: - OSX - The ability to drag and drop keywords onto photo or groups of photos - The ability to write keywords directly to ITPC/EFIX metadata in the original file - The ability to manage pictures in their original location without importing them into a library If it matters, I'm using DropBox/Carousel for my photo storage/viewing. Lightroom does this well enough, but I'm not too eager to shell out the $150 for the privilege. I really don't need the other 99% of Lightroom features. Any recommendations?