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.
WriteNext - The writing application that boosts your writing. Increase focus and writing performance and reduce distractions by separating your creative writing from other activities. Let writing be the only activity you perform in the writing application.
Xmind - Xmind is a brainstorming and mind mapping application.
Stashany - Online notepad for developers
FreeMind - FreeMind is a premier free mind-mapping software written in Java.
Calmly Writer - Distraction-free text editor for Mac, Windows, Linux and ChromeOS.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.