This paper presents a comparative study of some distributed solvers on a set of linear systems arising from Navier-Stokes equations and provided by an industrial software. Solvers under consideration implement direct, iterative or domain decomposition methods and most of them are freely available packages. Numerical tests with various parameters are made easier by developing a unified toolbox that links with interface functions provided by these libraries. The intensive numerical tests performed on various sets of processors reveal the good performance results achieved by the recently proposed parallel preconditioner for Krylov methods based on an explicit formulation of multiplicative Schwarz [1].