Eigen is a great effort of TuxFamily.
similar to this I am always looking forward for a Graphics/Plotting library in C++.
I have checked many websites on this subject but none in my view as clean/hassel free(cross-plat form) as it is in Eigen.
It is high time a community like this should cater to the graphical/plotting needs of scientific computing.

thank you for awesome contribution.
Sudheer.