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.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Xmind - Xmind is a brainstorming and mind mapping application.
Shutter - Shutter is a feature-rich screenshot program.
FreeMind - FreeMind is a premier free mind-mapping software written in Java.
Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.