I\'d like to add some pie, bar and scatter charts to my Ruby on Rails web application. I want want them to be atractive, easy to add and not introduce much overhead.
I've just found ZiYa produces some really sexy charts and is Rails specific.
The downsides are it uses Flash and if you don't want the sites to link to XML/SWF page it costs $50 per site.
[I've not decided on it yet, but wanted to throw it out there in case people want to vote it up]