Gliffy and DropMind are online tools that allow users to create diagrams and mind maps. Gliffy can be used to create flowcharts, character webs, and other diagrams for teaching. DropMind is a mind mapping software that increases productivity and helps with planning, communication, and problem solving. Both tools are free, web-based, and allow for collaboration. They can be used by students, teachers, and anyone for note taking, brainstorming, studying, and presenting information.