(PAM) for Apache - ,od_auth_pam.c, the pluggable authentication module for Apache. pam.sourceforge.net/mod_auth_pam
Linux-PAM modules etc. page - Here is a list of the modules that people are using/developing for use with Linux-PAM. www.us.kernel.org/pub/linux/libs/pam/modules.html
Pam authorization - A 'wheel'-like authorization module that prevents users from su-ing to one another. is.rice.edu/~wymanm/projects
