Screen Capture--Image Only (Use to capture screenshots of what's on you screen)
Greenshot - PC (images only)
Screencasting--Video Only (Use to create videos of what is on your screen)
15 minutes of recording time. Records screen and webcam. Saves in MP4, AVI, FLV format. Publish to YouTube HD.
Screencast -- Free and pay versions (captures videos of what's on your screen).
Both Screencapture/Screencasting--Image and Video
Meet Icecream Screen Recorder, a tool that enables you to capture any area of your screen either as a screenshot or a video file. The intuitive and easy-to-use software offers a complete suite of tools and options for professional screen capture with audio. 10 minutes recording time.