mind mapping and brainstorming tool.
Best Tools For Visual Modeling
Browse 9 + Visual Modeling Tools

XmindFree and Paid

MindomoFree and Paid
Mind Mapping for thinking organization or structuring
draw.ioFree
Diagram creation for modeling systems

d3Free
Bring data to life with SVG, Canvas and HTML. đđđ

graphvizFree
Open source graph visualization software

Yed Graph EditorFree
High-quality diagrams made easy
Free drawing software for Windows, Mac OS X, and Linux

Bizagi ModelerFree
Diagram creation for modeling systems
Diagram creation