Navicat Data Modeler - Navicat Data Modeler allows users to create a conceptual model from an existing database and edit the structure of the database easily.
Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
Vertabelo - Online tool for visual database design.
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.