3-D Pie Chart

I would like to draw a 3-D pie chart in OpenGL.

Do anybody know of any good tutorials on how to do it? Does it exist any free libraries that do this?

In a modeler, draw a pie-chart. See the coordinates of vertices, construct some simple funcs to create such coordinates. Choose a nice camera-position to start from, use gluLookAt that looks at vec3(0,0,0). Use the glBegin() way for starters to draw the triangles, with coordinates returned from that simple func that you created.