TLSE (Test for Large Systems of Equations): The GRID-TLSE web site provides facilities to compare direct solvers for sparse matrices and to share sparse matrices. Several features are available to all users:consult the database of collections of sparse matrices and download matrix files. consult the database of bibliography references on sparse linear algebra. Other features are available after registration to the site: perform experiments on your own sparse matrix using direct solvers. quickly evaluate sparse direct solvers and obtain statistics on solving sparse linear systems. use the site as a platform for cooperative work on sparse matrices creating a private work group. upload a matrix into the site.