Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
SmartDraw - Instead of starting with a blank screen, SmartDraw gives you the exact template you need.
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.
Diagram Ring - Diagram Ring is an all in one universal level of diagram editor for DFDs, pie charts, bar charts, flow charts, class diagrams and much more.
ARIS Express - ARIS Express is based on the proven ARIS methodology and industry standards.
GenMyModel - Industry Standards Compliance. Finally a tool which respects 100% of the UML 2. 5 standards to model your software, and BPMN 2 standards for your business process.