gtk-screenshot is a program for taking screenshots. It captures the screen or a window and saves the image in the PNG format. It is similar to gnome-screenshot but it's not a GNOME application. All parameters may be specified on the command line, or the application can be graphicaly driven.
WebcamStudio is an application for creating your own TV studio on your computer for broadcasting through a virtual webcam. It can mix multiple video sources such as webcams, movies, images, and your desktop. It can also login to your preferred video streaming site like Stikam or BlogTV and start your own show or video blog. It features special effects, text overlay, video source transition, animations, and faces.