Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
Process Street - Create beautiful rich process documents in a simple to follow checklist format. Fast, free and incredibly simple to use.
ARIS Express - ARIS Express is based on the proven ARIS methodology and industry standards.
Pipefy - Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.