I've had great success with http://dimplejs.org

Makes common things easy and gets the hell out of your way when you want to customise things with D3.

I'm a fan of dimple as well. I created custom tags for it[1] so you can draw charts in the following manner:

  <dimple-chart data="data" height="300" width="300" margin-bottom="15%" type="bar">
    <dimple-axis position="y" type="measure" field="Awesomeness"></dimple-axis>
    <dimple-axis position="x" type="category" field="Word" orderBy="Word"></dimple-axis>
    <dimple-legend x="10" y="10" width="500" height="30" ></dimple-legend>
  </dimple-chart>

I just started building this using Mozilla's x-tags. Mainly to clean up my own app, others are welcome to take a look.

[1]https://github.com/falconair/dimple-chart

I've used http://nvd3.org/ in the past.

I think Rickshaw is one of the best http://code.shutterstock.com/rickshaw/

But there's also: http://tenxer.github.io/xcharts/

try dc.js http://dc-js.github.io/dc.js/

Contour http://forio.com/contour/

there is also c3.js http://c3js.org/