Twin directories of X:

[DIR]  ftp://ftp.uni-leipzig.de/pub/linux/pub/comp/os/linux/sunsite/libs/X/
[DIR]  ftp://ftp.zoology.ubc.ca/pub/unix/X/
[DIR]  ftp://ftp.research.telcordia.com/pub/world/BAnorth/terminfo_colr/X/
[DIR]  ftp://ftp.eenet.ee/pub/cpan/modules/by-module/X/
[DIR]  ftp://ftp.eenet.ee/pub/cpan/modules/by-category/08_User_Interfaces/X/
[DIR]  ftp://ftp.eenet.ee/pub/cpan/authors/id/X/
[DIR]  ftp://tsg_advert.iff/pub/unix/X/
[DIR]  ftp://ftp.eutelia.it/pub2/CPAN_Mirror/modules/by-module/X/
[DIR]  ftp://ftp.eutelia.it/pub2/CPAN_Mirror/modules/by-category/08_User_Interfaces/X/
[DIR]  ftp://ftp.eutelia.it/pub2/CPAN_Mirror/authors/id/X/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/libs/X/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/apps/editors/X/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/apps/graphics/hacks/X/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/apps/graphics/viewers/X/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/apps/sound/cdrom/X/
[DIR]  ftp://ftp.saintjoe.edu/pub/CPAN/modules/by-module/X/
[DIR]  ftp://ftp.saintjoe.edu/pub/CPAN/modules/by-category/99_Not_In_Modulelist/X/
[DIR]  ftp://ftp.saintjoe.edu/pub/CPAN/modules/by-category/08_User_Interfaces/X/
[DIR]  ftp://ftp.saintjoe.edu/pub/CPAN/authors/id/X/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors/ftp.suse.de/i386/supplementary/X/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/tex-archive/support/hypertex/hypertex/X/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/tex-archive/support/hypertex/tanmoy/X/
[DIR]  ftp://ftp.kfki.hu/pub/packages/perl/CPAN/modules/by-module/X/
[DIR]  ftp://ftp.kfki.hu/pub/packages/perl/CPAN/modules/by-category/08_User_Interfaces/X/
[DIR]  ftp://ftp.kfki.hu/pub/packages/perl/CPAN/authors/id/X/
[DIR]  ftp://62.128.1.71/pub/CPAN/authors/id/X/
[DIR]  ftp://62.128.1.71/pub/CPAN/modules/by-module/X/
[DIR]  ftp://62.128.1.71/pub/CPAN/modules/by-category/08_User_Interfaces/X/
[DIR]  ftp://ftp.jpr.com/X/
[DIR]  ftp://ftp.rdc.cl/pub/Unix/Linux/Perl/CPAN/modules/by-module/X/
[DIR]  ftp://ftp.rdc.cl/pub/Unix/Linux/Perl/CPAN/modules/by-category/08_User_Interfaces/X/
[DIR]  ftp://ftp.rdc.cl/pub/Unix/Linux/Perl/CPAN/authors/id/X/
[DIR]  ftp://ftp.freechess.org/pub/chess/X/
[DIR]  ftp://ftp.skynet.be/mirror2/suse.com/suse/i386/supplementary/X/
[DIR]  ftp://ftp.kreonet.re.kr/CTAN/support/hypertex/hypertex/X/
[DIR]  ftp://ftp.kreonet.re.kr/CTAN/support/hypertex/tanmoy/X/
[DIR]  ftp://ftp.kreonet.re.kr/languages/CPAN/modules/by-module/X/
[DIR]  ftp://ftp.kreonet.re.kr/languages/CPAN/modules/by-category/08_User_Interfaces/X/
[DIR]  ftp://ftp.kreonet.re.kr/languages/CPAN/authors/id/X/
[DIR]  ftp://ftp.cs.wisc.edu/pub/devise/X/
[DIR]  ftp://ftp.cs.wisc.edu/pub/X/
[DIR]  ftp://ftp.cs.toronto.edu/pub/X/
[DIR]  ftp://ftp.cs.uni-bonn.de/pub/mirror/CPAN/modules/by-module/X/
[DIR]  ftp://ftp.mcs.vuw.ac.nz/_mnt/pub/packages/X/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-5_BETA/xsrc/xfree/xc/programs/Xserver/GL/mesa/X/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-current/xsrc/xfree/xc/programs/Xserver/GL/mesa/X/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-current/xsrc/external/mit/xorg-server/dist/GL/mesa/X/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/branches/-current/commerce/X/
[DIR]  ftp://ftp.mcs.vuw.ac.nz/_mnt/pub/packages/X/R5/mit/lib/X/
[DIR]  ftp://ftp.mcs.vuw.ac.nz/_mnt/pub/packages/X/contrib.r5/lib/X/