Open access journals (physics and mathematics)

A number of phys & math journals is now available online
(often including the back issues) free of charge. Here is
an (obviously incomplete :)) list of links to such journals
in the fields of physics and mathematics.

in English, French and other languages:
Directory of Open Access Journals Electronic Library of Mathematics
Digital Mathematical Libraries
CEDRAM NumDam Project Euclid SIGMA Ukrainian Journal of Physics

in Russian:
MathNet.RU UFN (translated into English as Physics Uspekhi) JETP JETP Letters
Solid State Physics Physics of Elementary Particles and Atomic Nuclei (PEPAN)