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.
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.
Open-source and cross-platform picture manager and organizer with complete meta information support: add, edit, search and remove XMP, IPTC, EXIF and JPEG Comment. It also offers batch conversion/renaming of images and lossless rotation and cropping.
WACS is a tool for building Adult Web Sites; equally suitable for managing a private collection or building a commercial site. It has many powerful features including dynamic filtering, model catalogs, automatic download and powerful search engine.
A tool to organize your pictures
The Java Picture Organizer application lets users build collections of images that they can then search, browse, show and share with others. An HTML export facility is available that allows web pages to be generated.
wxArt2D gives wxWindows applications sophisticated vector drawing functionality. It is based on a framework supporting multiple views within a hierarchical document. Supports drawing & (Graph) editing. In-output in SVG, GDSII, XML, easy to extend.
JexifViewer is a project for viewing Exif informations stored in JPG files written by most digital cameras. JexifViewer lists Exif tags in a table for comparing images. Image viewer is included. Images can be rotated and flipped. Slideshow available.