Wikipedia
SPARSKIT
SPARSKIT is a tool package for working with sparse matrices. Its main objectives is to convert between different storage schemes in order to simplify exchange of data between researchers, and to do basic linear algebra and matrix manipulation. SPARSKIT is written by Yousef Saad, currently an I.T. Distinguished Professor at the University of Minnesota, with contributions from various agencies. It is written in Fortran, and released under the GNU Lesser General Public Licence.