Here are a few interesting titbits concerning numerical linear algebra:

- Ake Bjorck's least-squares bibliography
- ILAS - The International Linear Algebra Society
- University of Florida sparse matrix collection
- NAS graph and matrix visualization collection
- MatView, a scalable sparse matrix viewer
- The Matrix Market
- Jack Dongarra's list of freely-available linear algebra software and another
- Tim Davis' CSparse package
- Codes for the direct solution of sparse, symmetric linear systems: Boeing, DSCPACK, HSL, MUMPS, Pastix, PARDISO, PSPASES, SPOOLES, TAUCS, WSMP, YSMP
- Codes for the direct solution of sparse, unsymmetric linear systems: HSL, MUMPS, SuperLU, UMFPACK
- A survey of iterative solvers by Victor Eijkhout
- 2nd edition of the LAPACK Users' Guide
- Nick Higham's Matlab Matrix Computation Toolbox
- Yousef Saad's parallel Algebraic Recursive Multilevel Solver (pARMS)
- Jampack, a package for manipulating matrices in Java
- Linear Algebra Year at CERFACS
- BLAS Technical Forum Standard
- BLAS for LINUX
- tuning BLAS for new machines using ATLAS
- Matran, a Fortran 95 matrix wrapper
- ITSOL, a C package for solving linear systems of equations by iterative methods
- RISOLV, a robust iterative solver for large scale linear systems
- Colamd, a set of C subroutines/matlab functions for sparse matrix column reordering prior to Gaussian elimination
- METIS, to partition unstructured graphs and meshes, and compute fill-reducing orderings of sparse matrices
- ParMETIS, a parallel graph partitioning and sparse matrix ordering library
- AZTEC, a parallel iterative package for the solving linear systems
- BPKIT - a block preconditioning toolkit
- Sparse approximate-inverse preconditioners from Steve Barnard at NASA; more from Marcus Grote at ETH; a parallel version, ParaSails from Edmond Chow at LLNL
- The parallel linear algebra package (PLAPACK) Users' Guide
- LASPack user's manual
- MATCOM a Matlab to C++ translator and a matrix class library
- Matrix LIB, a C++ Matrix Class Library
- Jama, a Java Matrix Package
- Matrix inequalities in science and engineering
- Hierarchical Matrices