ExifTool is a platform-independent Perl library plus a command line application for reading, writing, and editing meta-information in image, audio, and video files. It supports many different types of metadata including EXIF, GPS, IPTC, XMP, JFIF, GeoTIFF, ICC Profile, Photoshop IRB, FlashPix, AFCP, and ID3, as well as the maker notes of many digital cameras.
libiptcdata is a C library for manipulating the International Press Telecommunications Council (IPTC) metadata stored within multimedia files such as images. This metadata can include captions and keywords, often used by popular photo management applications. The library provides routines for parsing, viewing, modifying, and saving this metadata. The libiptcdata package also includes Python bindings and a command-line utility, iptc, for viewing and editing IPTC data in JPEG files.
pHoToMoLo is a toolset for managing JPEG images in JFIF or Exif format. Photomolo generates a static HTML 4.01- and CSS 1-based multi-resolution image gallery for a directory tree containing images. Exifiron losslessly compresses and corrects the orientation of Exif JPEG images. Jpegnail removes or embeds thumbnails. Jpegcom lets you edit embedded image comments using any text editor and image viewer. A shell script frontend for Exifiron is included for copying images from removable storage, such as USB or Compact Flash.
iOta (Image Organization Tool and Archiver) is a tool to manage, organize, index, archive, and Web-publish your digital photography collection. It is backed by a BerkeleyDB database. The KDE/QT based front-end is designed to be simple, yet powerful. iOta allows the user to generate, uniquely rename, and index images to an embedded database. The user can also caption and describe each image, generate thumbnails and browsable HTML indexes, archive directories of images onto CDR, and search and edit properties of each photograph in the user's collection. In addition, all this information also travels with the image itself in the thumbnail EXIF header.