Binary Option Broker Class Diagram, created with Gliffy
One of the best UML / Java modelling tool, as online version, private or as published model (see below).
Gliffy as Confluence Plugin: Easy to use, fully integrated, creation of diagrams directly from Confluence or even from Jira, wide range of options, extensive shape libary (UML and others), wide range of chart types, exportable result, export your charts in popular formats such as jpg or png, diagram change history, security, safely through Jira or Confluence rights concept, flow charts, Business Process Models (modern BPMN modelling), SWOT diagrams, UML, flow charts, network diagrams, floor plan, image import, org.charts
Absolutely great and affordable!
See Gliffy: http://www.gliffy.com/go/publish/6311789
(currently removed, go to Gliffy link above)