I'm looking for a way to link files, so that if you find one you'd also be able to access the others. Here's an example: I have several photos, a .gpx GPS file, and a couple of say txt files. All are from a hike and include related info. After the trip I want to be able to quickly find them all. The photos are stored in a digital asset manager (Lightroom), and have photo metadata like keywords, but are in a folder with all photos. The .gpx and .txt files are elsewhere. What hasn't worked are photo keywords (only available in photos and a DAM, not .txt or .gpx), OS X tags (not hierarchical, too difficult to come up with unique ones for each group of files), and using folders for each (kinda clumsy and too many for the same reason tags don't work). I have used DevonThink Pro, which lets me index the files in place and add them to DTP's database. But what I'd ideally like is something that would simply link the files so that wherever they are they are associated, so that all applications could have access to the group. Rather like how a DAM like Lightroom or Aperture works, where you can create virtual collections/albums of files without actually moving them around in the Finder, and stack them, etc. In fact, why isn't there a Lightroom, iPhoto or Aperture for ALL files??