I think we have one in the team behind Vega Lite. Vega has a concise and well-designed grammar of graphics. It comes from the same academic centre (UW Interac

I think we have one in the team behind Vega Lite. Vega has a concise and well-designed grammar of graphics. It comes from the same academic centre (UW Interactive Data Lab) where Mike Bostock developed d3, and I think complements d3 nicely as a higher level tool. Hadley Wickham's slightly abortive ggvis project was a wrapper around Vega. Altair is the python library that wraps Vega Lite, making it even more concise to write chart specs. One important unique feature is that Vega and Vega Lite (and Altair) provide declarative syntax for complex interactions such as cross filters. I wrote a blog post recently with much more detail about all of this: https://medium.com/@robin.linacre/why-im-backing-vega-lite-as-our-default-tool-for-data-visualisation-51c20970df39 https://medium.com/@robin.linacre/why-im-backing-vega-lite-a...