Pie Chart Software

The vector stencils library Pie charts contains 30 templates you can use to add pie and donut charts in your business documents, presentation slides and infographics using the ConceptDraw PRO diagramming and vector drawing software.
"A pie chart (or a circle graph) is a circular chart divided into sectors, illustrating numerical proportion. In a pie chart, the arc length of each sector (and consequently its central angle and area), is proportional to the quantity it represents. While it is named for its resemblance to a pie which has been sliced, there are variations on the way it can be presented. ...
Pie charts are very widely used in the business world and the mass media. However, they have been criticized, and many experts recommend avoiding them, pointing out that research has shown it is difficult to compare different sections of a given pie chart, or to compare data across different pie charts. Pie charts can be replaced in most cases by other plots such as the bar chart. ...
However, if the goal is to compare a given category (a slice of the pie) with the total (the whole pie) in a single chart and the multiple is close to 25 or 50 percent, then a pie chart can often be more effective than a bar graph. ...
A doughnut chart (also spelled donut) is functionally identical to a pie chart, with the exception of a blank center and the ability to support multiple statistics as one." [Pie chart. Wikipedia]
The example "Design elements - Pie charts" is included in the Pie Charts solution of the Graphs and Charts area in ConceptDraw Solution Park.