gPhoto is a program and library framework that lets users download pictures from their digital cameras. The libgphoto2 library gives you access to hundreds of models of digital cameras on several platforms. GIT repo and Issue tracker lives at https://github.com/gphoto/ these days.
LinPHA is an easy to use, multilingual, flexible photo/image archive/album/gallery written in PHP. It uses a SQL database to store information about your pictures. It comes with a HTML based installer, so you don't need experience in setting up SQL
IIPImage is an advanced high-performance imaging server and client
IIPImage is a high performance image server and client for viewing, navigating and zooming within high resolution images on the internet. Images in TIFF or JPEG2000 format are efficiently streamed by the server to a choice of clients that can be embedded within a web page.
Comix is a user-friendly, customizable image viewer. It is specifically designed to handle comic books, but also serves as a generic viewer. It reads images in ZIP, RAR or tar archives (also gzip or bzip2 compressed) as well as plain image files.
ZoneMinder is video and cctv surveillance and security application. It supports multiple video or IP cameras and a sophisticated motion detection system based around zones. Both live streams and historic events can be viewed via the web interface.
xCHM is a cross-platform GPL frontend for CHMLIB (http://www.jedrea.com/chmlib/) written with the wxWidgets framework.
A slide show for JPG, GIF, BMP, PNG, TIF, & WMF files; maximizes images without distortion. Folders can be selected at run time, or in advance with arguments or a .picshow file. File name, date of picture, and comment can optionally be shown with image.
Linux i386 CAR MULTIMEDIA SYSTEM based on Pyton (pygame mysqldb, etc) and Mysql: Mp3, Divx, Xvid, avi, mpeg, jpeg media supported
CycleAtlas is a cycling diary based on a custom road atlas. It can be used to store or to plan new rides. Functions includes generation of planimetry, profiles and route time tables of rides. A map editor is included, in order to create a custom road map
Open source Linux app for photo editing and collection management
Navigate a large image collection using a thumbnail browser, click on an image to view or edit. A rich set of edit and retouch functions is available. Import RAW files and edit with deep color. Save revised images as JPEG, PNG (8/16 bits), or TIFF (8/16). Select an object or area within an image (freehand outline, follow edges, select matching tones, ... ), apply edit functions, copy and paste, resize, blend, warp, etc. without using layers. Edit functions have fast feedback using the full image. Add metadata to images (tags, geotags, dates, ratings, captions ...). Search images using any metadata and/or folder and file names or partial names. Batch functions are available for renaming, adding metadata, moving, converting, resizing, and RAW conversion. Fotoxx uses your image files wherever they are and maintains a separate index for fast searching. Fotoxx is standards compliant and can be used with other photo edit programs (no lock-in).