FastStone Image Viewer - I really like this image viewer/organizer. I've even created over 5 hours of video clips showing how to use various features. (If you are a member of a local club, ask me about special pricing when you see me.)
Screen Capture Utilities: Here are two free ones I really like: FastStone Screen Capture and Screen Hunter. FastStone Screen Capture (the stand-alone program, not the screen capture built into FastStone Image Viewer) has better features, but is no longer free ... you have to register it to continue using it after 30 days.