UI Movement - The best UI design inspiration, daily
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Design Hunt - Curated design inspiration for everyone
Shutter - Shutter is a feature-rich screenshot program.
Page Flows - User flow design inspiration for mobile & desktop
Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image