The Computational Fluid Dynamics General Notation System (CGNS) library is now available in Fedora under the zlib license. Install it using:

$ yum install cgnslib

It provides a general, portable, and extensible standard for the storage and retrieval of computational fluid dynamics (CFD) analysis data. It consists of a collection of conventions, and free and open software implementing those conventions. It is self-descriptive, machine-independent, well-documented, and administered by an international Steering Committee.