Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
SmartWindows.app - Auto arrange all your app windows, whether on one screen or many with a single click!
Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
ReIcon - ReIcon is portable freeware that enables you to save and restore your desktop layout.
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.
VC Starter Kit - Everything you need to look like a Venture Capitalist