Google Charts - Interactive charts for browsers and mobile devices.
Xmind - Xmind is a brainstorming and mind mapping application.
Highcharts - A charting library written in pure JavaScript, offering an easy way of adding interactive charts to your web site or web application
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
ZoomCharts - Creating meaningful and aesthetically pleasing data visualizations and incorporating them into your projects is easy with the tools offered by ZoomCharts.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.