Turning EXIF data into something useful

There's a FREE app called EXIFRenamer which...well...renames files based on their EXIF data. This is handier than you'd think:

The program allows to rename photos by their embedded date+time information in a much more usable way. Most downloaded pictures are named like "pic0001.jpg" or other cryptic names.
ExifRenamer reads the embedded date+time information and renames the picture to for example "2001-11-18_11-16-34.jpg" (YYYY-MM-DD_hh-mm-ss.jpg). This naming style lets you easily create a large photo library with the chance to sort your pictures in chronological order just by displaying it alphabetically sorted in the Finder.

You can check it out and download it here. It also integrates with Image Capture, the scanning, camera downloading multi-tool Apple app everyone seems to forget...