Google Charts - Interactive charts for browsers and mobile devices.
Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
ZoomCharts - Creating meaningful and aesthetically pleasing data visualizations and incorporating them into your projects is easy with the tools offered by ZoomCharts.
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.