Flot Charts
Multiple Statistics
Stacked chart not only shows the trends over time, you can also see the cumulative sum of all data.
Realtime Statistics
You can update a chart periodically to get a real-time effect by using a timer to insert the new data in the plot and redraw it.
Donut Pie Chart
Pie chart is used to see the proprotion of each data groups, making Flot pie chart is pretty simple, in order to make pie chart you have to incldue jquery.flot.pie.js plugin.