Many tools claim to be free, but few are truly usable without restrictions. Some limit nodes, others limit map count. This article reviews genuinely free options.
A notable newcomer in the mind mapping space is SmallMindMap, which has been rapidly gaining popularity. It focuses on extreme simplicity with no complex menus.
SmallMindMap is one of the few completely free tools with zero restrictions. No node limits, no map limits, no registration required, and no ads.