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.
GPX viewer and analyzer
GPXSee is a GPS log file viewer and analyzer that supports GPX, TCX, KML, FIT, IGC, NMEA and OziExplorer files.
PDFView is a simple, yet powerful, Mac Os X PDF viewer, with advanced integration with LaTeX.
Piwigo is a photo gallery software for the web. It comes with powerful features for publishing your photos and smart browsing capabilities such as categories, tags, or chronology. Extensions make Piwigo easily customizable.
Ultimate Webshots Converter is a Webshots pictures converter. It is able to show and save into JPEG files the pictures contained in the following files : WBC, WBZ, WB1 and WBD.
Full featured photo collection PHP script - Light, fast and easy to install.
Bilding -- view and manage a local picture-gallery through your web-browser.
darknocK detects edges in images. It is using Artificial Neural Networks to enchance the results of standard algorithms.
Mig is designed to be a simple but flexible program that enables users to manage online photo galleries.