Screen Clipper is a free and portable screenshot capturing tool designed to quickly capture any portion of your desktop screen. Once launched, you simply drag the capture window over the desired area, adjust the size as needed, and click the check-mark to snap the screenshot instantly.
Snap is a free portable screen capture tool that can be used to capture screen shots of active Windows. Ether select the active window or create an area on the desktop and click Snap to copy to the clipboard. The resulting clipboard images can then be opened and edited using your favorite image editing tools such as photoshop.
SiteShoter is a free and portable webpage screenshotting tool developed by NirSoft. It allows you to capture screenshots of entire web pages automatically, without needing to open a visible browser window.
Wink Portable is a free and lightweight screen recording and screencasting tool designed to run directly from a USB flash drive without installation. Based on the original Wink tutorial creation software, this portable version allows users to create software tutorials, demonstrations, and instructional walkthroughs from virtually any Windows PC.