Hello folks, its been a long long time. Just thought of putting this tiny piece of info on GSL here. The GNU Scientific Library is a numerical library from the GNU. This is really useful for those who deal with complex mathematical functions day in and day out.
A subset of features supported by the GSL includes Complex Numbers, Roots of Polynomials, Physical Constants and Differential Equations. They of course support a lot more adn the full list acan be found at the official site.