Google Charts - Interactive charts for browsers and mobile devices.

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!

Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application

Wisdomap - Wisdomap Medicine is a study aid that helps medical students create differential diagnoses and suitable management plans from a presenting complaint and structured revision notes.

ZingChart - ZingChart is a fast, modern, powerful JavaScript charting library for building animated, interactive charts and graphs. Bring on the big data!

IOctopus - IOctopus is an online mind map service for a dive deep into the mind for the best ideas.