fiScanner - A (WIA) image scanner application for Windows 7 or greater, providing better scanning functionality than Windows Fax and Scan. Allows the output folder and (base) filename to be specified, and also allows for multiple scans at once.
Does not support Windows XP.
...It dynamically adjusts capture rate to keep your computer responsive while screencasting.
It's designed to be extremely straightforward, with very little twiddling of settings. Its best use is for quick helpful screen casts or game videos.
Standalone tool for taking pictures out of your webcam
...It does not requires any installation, just grab it and run to take images.
It supports, fast image processing algorithms to take bitmap images and support the camera settings, so you can adjust your camera according to your need.
gptp is a simple gtk frontend for libptp which lets you control the settings and download images from your (Picture Transfer Protocol able) digital camera. so far only a few basic functions are supported and it was only tested with my Nikon D80.