Diagramo - Diagramo is an online flowchart software - diagrams (create, edit and share)
D3.js - D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS.
Modelio - Modelio is an open source modeling tool supporting natively UML, BPMN and model exchange with XMI.
Chart.js - Easy, object oriented client side graphs for designers and developers.
UML Designer - UML Designer provides a set of common diagrams to work with UML 2.5 models.
Google Charts - Interactive charts for browsers and mobile devices.