ftp://ftp.undernet.org/pub/clients/  direct

[DIR]xwindows/  direct  81 twin directories
[DIR]windows/  direct  10858+ twin directories
[DIR]vms/  direct  4133+ twin directories
[DIR]vm-cms/  direct  61 twin directories
[DIR]unix/  direct  21640+ twin directories
[DIR]tcl-tk/  direct  27 twin directories
[DIR]perl/  direct  17208+ twin directories
[DIR]palmpilot/  direct  45 twin directories
[DIR]os2/  direct  6496+ twin directories
[DIR]newton/  direct  517+ twin directories
[DIR]msdos/  direct  6575+ twin directories
[DIR]magic-cap/  direct  2 twin directories
[DIR]macintosh/  direct  3060+ twin directories
[DIR]java/  direct  38767+ twin directories
[DIR]elisp/  direct  2888+ twin directories
[DIR]beos/  direct  3660+ twin directories
[DIR]atari/  direct  6407+ twin directories
[DIR]amiga/  direct  12031+ twin directories
[DIR]acorn/  direct  1983+ twin directories