Hydra ia a suite of applications and libraries for non-invasive image and file tagging.

• Tag images collections of images with any number of tags
• Lets you do queries (searches) on directories of images based on tags.
• The tags are stored in a central database on your computer. They are NOT stored in the images (the image files are not touched) and they are NOT stored in files in each directory (those get lost).

• Includes Hydra Desktop, an interactive desktop application for image tagging and cataloging in addition to several automatable command line programs.

Hydra is free, open-source software. Just use and enjoy. Any feedback you have would be appreciated - please sent any to Alex Demko. Developer source code is available here