TiddlyMap - An interactive concept- and mind-mapping plugin for the personal note-taking software TiddlyWiki based on the Vis.js library. It's free and open-source!
Google Charts - Interactive charts for browsers and mobile devices.
textografo - Online diagramming application which generate diagrams based on text and allows real time...
ZingChart - ZingChart is a fast, modern, powerful JavaScript charting library for building animated, interactive charts and graphs. Bring on the big data!
Minzel - Minzel is a beautiful and free mindmapping tool built for creatives and gives you the power to...
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application