Onlie Chart tool

How did you create your chart,such as workflow chart,network diagram etc. with what's tool? MS Visio,Power designer? which one. Today I find an interesting tool that you can create these chart online,seee http://my.lovelycharts.com/ ,it's build the chart diagram by Flash,and you can create ,publish your chart online,or export the diagram as an image. following is a screen shot: