Ask HN: Any recommendations for good, free / open source JS graphing libraries?

[manuscreationis]

Just curious what people are using these days.

In the past I've relied on the Google API, or flot, but wondering what the good folks here are into using.

Thanks in advance for the help

[kaolinite]

I used flot quite recently and found it very good. Another that I've looked at, but not used, is Graphael: http://g.raphaeljs.com/

[Rust]

Highcharts (http://www.highcharts.com/) is pretty darn good.

[manuscreationis]

Would you say it's worth the cost of a full license?

Edit: I should specify we'd need to obtain a multi developer license, and that comes with a large cost