Visual Understanding Environment - Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool.

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

ShuffleInspire - ShuffleInspire seeks to provide inspiration and boost production to builders and makers in the online community.

Shutter - Shutter is a feature-rich screenshot program.

Aibase - Creative Data Manager

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