Xmind - Xmind is a brainstorming and mind mapping application.
Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
Visual Understanding Environment - Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool.
Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
FreeMind - FreeMind is a premier free mind-mapping software written in Java.
ARIS Express - ARIS Express is based on the proven ARIS methodology and industry standards.