What are the best visualization projects according to HackerNews?

plotly.js
8 comments
roughViz
6 comments
remake
6 comments
arcan
6 comments
clerk
6 comments
itermplot
5 comments
butterchurn
5 comments
Rath
5 comments
bokeh
3 comments
rerun
3 comments
graphic-walker
3 comments
paisa
3 comments