A library optimized for concise, principled data graphics and layouts

If all you need are time-series graphs, I really like Dygraphs: http://dygraphs.com/ It doesn't seem to get much love, does anyone know why?

No dependencies, fast, highly customizable, responsive. I use it for everything.

I tried this out once. At the time the CSS wasn't namespaced, and used fairly common class names, so it interfered with other parts of the project. Not sure if it has been fixed since.

Eventually went pure D3.

The linked page:

"Important changes in v2.0

The library is now namespaced. data_graphic is now MG.data_graphic, convert_dates is now MG.convert.date, clone is now MG.clone, button_layout is now MG.button_layout and data_table is now MG.data_table. We added a new convenience function called MG.convert.number."

Love the combined simplicity and expressiveness!