  Gypsilab is a Matlab framework which aims at simplifying the development of
numerical methods that apply to the resolution of problems in multiphysics, in
particular, those involving FEM or BEM simulations. The peculiarities of the
framework, with a focus on its ease of use, are shown together with the
methodology that have been followed for its development. Example codes that are
short though representative enough are given both for FEM and BEM applications.
A performance comparison with FreeFem++ is provided, and a particular emphasis
is made on problems in acoustics and electromagnetics solved using the BEM and
for which compressed H-matrices are used.
