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.
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.
PDFView is a simple, yet powerful, Mac Os X PDF viewer, with advanced integration with LaTeX.