Google Charts is a free service. It's what we use inside Google to create our own charts, and we hope you'll find it useful.
Creating the perfect chart can be hard. Google Charts have reasonable defaults, but can also be customized in countless ways. Sometimes chart creators have an image of that perfect chart in their head, and it can sometimes be tough figuring out which set of options are needed.
There is an active Google Charts forum where users help one another learn and discover the best ways to convey information graphically.
We are continually improving the service, with new releases every few months. We announce those on the forum and on our releases page. If you have suggestions for our developer team, we also have an issue tracker.