libptp is a Picture Transfer Protocol support library. It is used for downloading images from PTP cameras. It currently works with most modern cameras from the following vendor: Kodak, HP, Nikon, Canon, Panasonic, Olympus, Konica, Minolta, Fuji, Ricoh, and Sony. This package also contains "ptpcam", the tool used to tweak camera properties and perform some basic operations.
snapscreenshot takes a screenshot from a single Linux virtual console (tty) or from a group of ttys. It does not care if it is a plain text mode or framebuffer console; it only needs read-access to /dev/vcsa* -devices. The program outputs a tga file to stdout; use an image manipulation program to convert it to png or whatever you prefer.