Interactive & Re-Usable Charts With D3.js: NVD3.js
The library follows the practices an style of "how D3.js was built" which makes it comfortable for D3.js fans.
Charts generated are interactive and can be easily improved or customized.
Although it is in the early stages of its development, there are already multiple chart types including line, bubble, area and several combinations of them.
Compatibility: All Major Browsers