title: Open source library/framework for building dashboard (bar,line,pie,etc)
body: <p>I have done POC with highcharts and works fine and looks great.</p>
  <p>I am looking for better open source library/framework using which i can develop my dashboard showing different graphs.</p>
  <p>The UI framework must handle the real time data (like Ajax calls or REST).</p>
  <p>Any helpful suggestion appreciated.</p>