This document discusses and compares several free online tools for creating mind maps and concept maps: Bubbl.us, Mindomo, Wisemapping, Mindmeister, and Mind42. It provides a brief overview of the features of each tool, noting that Bubbl.us and Wisemapping are best for basic text-only maps while Mindomo, Mindmeister, and Mind42 allow for richer content like images, videos, notes and attachments. All the tools allow the user to start with a central idea and branch out additional ideas or thoughts connected to it in a visual web-like structure.