Twin directories of devel_tools:

[DIR]  ftp://ftp.cesnet.cz/.vol/ftp.xfree86.org/pub/mirror/X.Org/contrib/devel_tools/
[DIR]  ftp://ftp.jp.xemacs.org/pub/X/opengroup/contrib/devel_tools/
[DIR]  ftp://ftp.csie.nctu.edu.tw/pub/X11/contrib/devel_tools/
[DIR]  ftp://ftp.nrc.ca/pub/systems/window-sys/X-contrib/devel_tools/
[DIR]  ftp://core.ring.gr.jp/pub/X/opengroup/contrib/devel_tools/
[DIR]  ftp://ftp.opengroup.org/pub/ftp.x.org/contrib/devel_tools/
[DIR]  ftp://ftp.gts.cz/.2/x11/contrib/devel_tools/
[DIR]  ftp://ftp.ntnu.no/pub/X11/contrib/devel_tools/
[DIR]  ftp://ftp.xfree86.org/pub/mirror/X.Org/contrib/devel_tools/
[DIR]  ftp://ftp.x.org/contrib/devel_tools/
[DIR]  ftp://ftp5.freebsd.org/pub/X/contrib/devel_tools/
[DIR]  ftp://ftp.uvsq.fr/pub/X11/x.org/contrib/devel_tools/
[DIR]  ftp://ftp.gwdg.de/pub/x11/x.org/contrib/devel_tools/
[DIR]  ftp://ftp.uni-siegen.de/pub/x11/x.org/contrib/devel_tools/
[DIR]  ftp://ftp.uni-heidelberg.de/pub/X11/contrib/devel_tools/