Freeplane began as a fork of the Freemind project. While maintaining comparability with Freemind file format, it has far outpaced in features and development. As of 3/5/2022, the latest Freeplane update (1.9.3) is 3/5/2022 vs Freemind was last updated (1.0.1) 2/5/2016. Active, helpful community.
Xmind - Xmind is a brainstorming and mind mapping application.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
FreeMind - FreeMind is a premier free mind-mapping software written in Java.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
Visual Understanding Environment - Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.