From Shahar Prish:
Prish Image Resizer is a new "Power Toy" replacement for Windows Vista/7/XP. It allows you to resize images using the right-click menu. Right-clicking on an image (or a group of images) will bring up an extra two options - "Copy Picture" and "Prish Resizer". The "Copy Picture" option allows you to copy the image directly from explorer to the clipboard. This way, you can copy & paste directly from explorer w/o having to go through file menus of your application. Current build adds custom resize to context menu.