Epic Pen - A windows tool for drawing over your desktop and applications
SageThumbs - SageThumbs is a powerful shell extension allowing to preview enormous amount of image formats...
gInk - An on-screen on-screen annotation software for Windows.
ThumbView - ThumbView enables image thumbnails and tooltips in Microsoft Windows XP Explorer (does not work on...
Gromit-MPX - Create annotations by directly drawing on your screen.
Pictus - Pictus is a fast, free image viewer that enables Windows to see thumbnails of supported formats, such as PSD. Give it a spin today!