ftp://192.87.102.42/vol/1/netbsd/NetBSD-release-4-0/src/gnu/usr.bin/groff/contrib/  direct

[DIR]CVS/  direct  1000+ twin directories
421 B  2006-02-04Makefile  510+ mirrors
[DIR]mom/  direct  174 twin directories
202 B  2003-06-28Makefile.inc  113 mirrors
[DIR]gdiffmk/  direct  128 twin directories
[DIR]groffer/  direct  270+ twin directories
[DIR]mm/  direct  1000+ twin directories