Robinhood - Free stock trading service.

Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

Bux - Casual stock trading - thumb swipes only

Shutter - Shutter is a feature-rich screenshot program.

Contora - Alternative data on the companies activity on the web for retail traders

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