Here are some to try.
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Photo Organizer - Multi-user photo management tool
http://www.k-i-s.net/article.php?article=6
Photo Organizer is a multi-user photo management tool designed for professional photographers. It offers a searchable photo database that supports photo version control, client management, photo submission history, EXIF, IPTC, XML, user quotas, a datebook, and printing labels and color brochures in PDF and PS formats. It uses PostgreSQL, features a Web interface, and uses ImageMagick and DCRAW to handle over a hundred image formats including several RAW formats.
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imgSeek - Photo collection manager that can search by images
http://sourceforge.net/projects/imgseek
imgSeek is a photo collection manager that searches through an image database by either a rough sketch painted by the user or as another image you supply. You draw a rough sketch of what you want to find and imgSeek displays a thumbnail of the best matches. You may also find duplicate images automatically, generate Web photo albums, edit image metadata including EXIF JPEG data, organize images into a keyword hierarchy, and more.
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gPhoto2
http://gphoto.sourceforge.net/
gPhoto2 is a free, redistributable, ready to use set of digital camera software applications for Unix-like systems, written by a whole team of dedicated volunteers around the world. It supports more than 600 cameras
gPhoto2 runs on a large range of UNIX-like operating system, including Linux, FreeBSD, NetBSD, etc. gPhoto is provided by major Linux distributions like Debian GNU/Linux, Gentoo, RedHat Linux, SUSE Linux, Mandriva, etc.
gPhoto2 is freely available and distributed under the terms of the GNU LGPL.
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