We&#x27;ve really enjoyed c3.js (<a href="http:&#x2F;&#x2F;c3js.org&#x2F;" rel="nofollow">http:&#x2F;&#x2F;c3js.org&#x2F;</a>). It has a wide offering of visualizations types and come with nice on-hover tooltips, which is something that I&#x27;ve had trouble finding anywhere else. Unfortunately it&#x27;s difficult to customize their offerings, but they&#x27;ve covered 90% of our usecases.