- No database required, comments are stored in "per folder plain text file", like Picasa (from Google) does. All comments, display configuration, sorting options, etc.. are there. Navigation structure is mapped to your file system structure (you can add folders to the ignore list though). - Quick, smart, keyboard based navigation - Sign in with your Twitter and Facebook account. You don't have to configure anything, just set the administrators list. A user can delete his own comment up to 20 minutes after posting. An administrator can delete any comment any time. - Super-simple, super-fast (server thumbnail caching, ajax smart pre-fetching, etc) - Full source code is included. Easy to extend and customize it to fit your needs. - EXIF reader. - Administrators can edit image information inline or upload new pictures..