imgsort
Command line utility to organize images using EXIF metadata
This program recursively traverses a directory and moves all images to a fixed folder structure (YYYY/month/DD/file). To do this, I grab the date the image was created from the EXIF metadata. If this doesn't exist in the image, I move it to a default date (some time in 2000). Currently I only move files detected to be images, but I may add the ability to recognize other files.
In my cursory testing, I've found the program capable of fully traversing and organizing 290 mb of pictures in about 4 seconds.