Hallo!

Currently I'm developing a scientific application, which is written in
C++ for Windows.
I've already implemented 3D visualization using OpenGL, and everything
work fine.
The next step is 2D plotting of output data.

The problem: I'm looking for an OpenGL 2D plotting library for several
months
without any result. There are thousands of plotting libraries using
Windows GDI,
Windows GDI+, .NET, GTK and everything you can imagine. And what about
OpenGL?

Could anybody help me? A name of any freeware\opensource OpenGL
2D plotting library would be very helpful to me.