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.
Nanoshot - an easy and convenient way to take screenshot. Priority principles: lightness and comfort. Nanoshot can take screenshots of screen area, selected windows, web pages and videos.
Camerad is a daemon to periodically fetch images from IP security cameras via http, store them on the filesystem in an organized manner and keep updated a set of thumbnails.