ftp://ftp.inf.utfsm.cl/pub/tex-archive/macros/latex/contrib/beamer/themes/  direct

[DIR]theme/  direct  2141+ twin directories
[DIR]outer/  direct  118 twin directories
[DIR]inner/  direct  122 twin directories
[DIR]font/  direct  6208+ twin directories
[DIR]color/  direct  1832+ twin directories