ExifTool!

Geeqie is a lightweight Gtk+ based image viewer for Unix like operating systems. It was forked from GQview. The development is focused on features for photo collection maintenance: raw format, Exif/IPTC/XMP metadata and integration with programs like UFraw, ImageMagick, Gimp, gPhoto or ExifTool.

Corel AfterShot Pro is fast, flexible digital photography workflow software that combines powerful photo management, advanced non-destructive editing and complete RAW processing.

pyExifToolGui is a graphical frontend for the open source command line tool exiftool by Phil Harvey.

Quick Image Comment was written to enter and change simply and quickly the user comment and artist (author) in digital images (e.g. JPEG and TIFF). These attributes are read from the EXIF, IPTC, and XMP properties of the image and are stored there.

Exiv2 is a C++ library and a command line utility to manage image metadata. It provides fast and easy read and write access to the Exif, IPTC and XMP metadata of images in various formats. Exiv2 is available as free software and with a commercial license, and is used in many projects.

PhotoME is a powerful tool to show and edit the meta data of image files. Thanks to the well organised layout and intuitive handling, it's possible to analyse and modify Exif and IPTC-NAA data as well as analyse ICC profiles - and it's completely FREE!

Exif Pilot is a Free EXIF Editor that allows you to manipulate META data within image files.

Server-based photo management software from Daminion Software. Single- and multi-user for small teams and creative professionals.

jhead is a Exif Jpeg header manipulation tool.

PhotoDirector is CyberLink’s professional level photo workflow application, extending from award-winning video editing software, PowerDirector.

EXIFManager is a free software that allows to:* quickly enter image description / user comment / author on a set of JPG picture, inside the EXIF data* rename pictures files using EXIF data and a powerfull rename pattern editor

Namexif is a free software to rename photos by date and time based on EXIF.

Sparkbox helps you to manage images for your design, unlike iPhoto, It is designed to look after the images besides the picture or photograph you took. It is a neat and clean image library in your Mac; It is perfect for designer to organize your image collection and take good use of your visual inspiration.