bubbl.us is a mind map tool. It's a visual thinking tool for structuring information, helping you to better understand, remember and generate new ideas.
License: Free
Bubbl.us is a user-friendly tool ideal for brainstorming and simple mind mapping, while ConceptDraw MindMap offers a more robust feature set suitable for complex project management and professional use. Overall, Bubbl.us is best for quick, collaborative sessions, whereas ConceptDraw caters to users needing advanced functionality and integrations.