I'm not a front end expert - trying to figure out what are the opinions about looking at Plotly. It's open source, which will address the highchart license problem. I was told it's built on top of D3 - which provides lot of flexibility.
The big drawback is download size - 1.0 minified. Will be nice to have something with lower footprint. For certain use cases using CDN is not an option.
Any other libraries that may fit the bill ?