Looking for fast online concept mapping

Posted by Dr Andus
Apr 21, 2015 at 11:15 PM

Are there any online equivalents to concept mappers like VUE, CmapTools and Scapple?

I mean that they are fast to use for brainstorming (as oppposed to services focusing on drawing pretty charts for presentational purposes, and therefore being too slow) and that they do not enforce a hierarchy by requiring a central node (as mind mappers do, of which there are a lot).