Can someone suggest me any good plugin on how to create graphs similar to those presented in the images bellow? If someone knows a way to do that with Google Charts that would be the optimal.
<img src="https://i.stack.imgur.com/2bQTx.png" alt="enter image description here">
The Google Chart Tools | Pie Charts page shows an example of a concentric pie chart:
<img src="https://i.stack.imgur.com/j374b.png" alt="enter image description here">
According to that page:
A concentric pie chart.
Supply two or more data series.
Is that along the lines of what you are looking for?