Bibliography on Sparse Linear Systems and Related Areas of Computation  
   With emphasis on Computational Linear Algebra, High Performance Computing, Mathematical Programming and Graph Theory. Searchable.
   http://liinwww.ira.uka.de/bibliography/Math/sparse.linear.systems.html

Information Base on Sparse Linear Systems and Matrix Computations  
   Bibliographic references, links and search interfaces.
   http://openlink.br.inter.net/sparse/main.html

Preconditioned Eigensolvers  
   Software, papers, and references.
   http://www-math.cudenver.edu/~aknyazev/research/eigensolvers/

Matrix Market  
   A visual repository of test data for use in comparative studies of algorithms for numerical linear algebra, featuring nearly 500 sparse matrices from a variety of applications, as well as matrix generation tools and services.
   http://math.nist.gov/MatrixMarket/

Bibliography on the Solution of Sparse Linear Systems and Related Areas of Computation  
   More than 2000 selected references, covering the solution of sparse linear systems and related areas of computation, including: computational linear algebra, high performance computing, mathematical programming and graph theory.
   http://citeseer.nj.nec.com/arantes97bibliography.html

Sparse Matrix Collection (T. Davis)  
   A collection of large sparse matrices from many scientific disciplines with links and software pieces to operate on matrix data structures.
   http://www.cise.ufl.edu/research/sparse/matrices/

Pseudospectra Gateway  
   The pseudospectrum of a matrix provides information about the behavior of the eigenvalues of A when A is subject to perturbations. Links to other resources.
   http://web.comlab.ox.ac.uk/projects/pseudospectra/