TiddlyMap - An interactive concept- and mind-mapping plugin for the personal note-taking software TiddlyWiki based on the Vis.js library. It's free and open-source!

Whimsical - The visual workspace for teams.

Wisdomap - Wisdomap Medicine is a study aid that helps medical students create differential diagnoses and suitable management plans from a presenting complaint and structured revision notes.

cmaps.io - Transform Notes into Visual Mind Maps

IOctopus - IOctopus is an online mind map service for a dive deep into the mind for the best ideas.

Mindmap Generator by MyMap.ai - Elevate learning and professional planning with MyMap's free mindmapping tool. Designed for simplicity and effectiveness in idea visualization.