Three Mind Mapping Tools That Save to Google Drive

http://www.freetech4teachers.com/2014/03/three-mind-mapping-tools-that-save-to.html

MindMup
Lucidchart
Mindmeister

7 Tools for Creating Flowcharts, Mind Maps, and Diagrams

http://www.freetech4teachers.com/2015/11/flowcharts-mindmaps-diagrams.html

Coggle

MindMup

Sketchlot

Connected Mind is a free mind mapping tool that you can find in the Google Chrome Web Store.