Twin directories of prolog:

[DIR]  ftp://ftp.uni-leipzig.de/pub/linux/pub/comp/os/linux/sunsite/devel/prolog/
[DIR]  ftp://ftp.reed.edu/mirrors/faqs/prolog/
[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/devel/lang/prolog/
[DIR]  ftp://ftp.fh-furtwangen.de/win32/development/prolog/
[DIR]  ftp://ftp.afps.chel.su/pub/UNIX/lang/prolog/
[DIR]  ftp://ftp.cs.odu.edu/pub/zeil/cs355/Handouts/prolog/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/systems/acorn/acornet/dev/prolog/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/systems/acorn/acornet/long/development/prolog/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/systems/acorn/acornet/short/dev/prolog/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/systems/acorn/acornet/tmp/prolog/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/systems/acorn/riscos/lang/prolog/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/linux/opensuse/repositories/devel:/languages/prolog/
[DIR]  ftp://ftp.uni-koeln.de/programming/prolog/
[DIR]  ftp://ftp.cyf-kr.edu.pl/pub/mirror/usenet/news.answers/prolog/
[DIR]  ftp://ftp.cyf-kr.edu.pl/pub/mirror/usenet/comp.answers/prolog/
[DIR]  ftp://ftp.cse.unsw.edu.au/pub/homecomputing/linux/prolog/
[DIR]  ftp://ftp.cse.unsw.edu.au/pub/homecomputing/winnt/prolog/
pkg://SWI-Prolog-5.2.6-1.tar.bz2:912081/SWI-Prolog-5.2.6-1/packages/xpce/  downloads[DIR]3  SWI-Prolog-5.2.6-1.tar.bz2/SWI-Prolog-5.2.6-1/packages/xpce/prolog/
pkg://SWI-Prolog-5.6.36-1.tar.bz2:2183128/SWI-Prolog-5.6.36-1/packages/xpce/  downloads[DIR]3  SWI-Prolog-5.6.36-1.tar.bz2/SWI-Prolog-5.6.36-1/packages/xpce/prolog/
pkg://SWI-Prolog-5.6.36-1.tar.bz2:2183128/SWI-Prolog-5.6.36-1/packages/jpl/examples/  downloads[DIR]3  SWI-Prolog-5.6.36-1.tar.bz2/SWI-Prolog-5.6.36-1/packages/jpl/examples/prolog/
pkg://Tix3.6d.tar.gz:85293/Tix4.1a3/man/  downloads[DIR]3  Tix3.6d.tar.gz/Tix4.1a3/man/prolog/
pkg://Tix4.0.4.tar.gz:555816/Tix4.0.3/man/  downloads[DIR]3  Tix4.0.4.tar.gz/Tix4.0.3/man/prolog/
pkg://Tix4.1.0.006.tar.gz:855499/Tix4.0.4/man/  downloads[DIR]3  Tix4.1.0.006.tar.gz/Tix4.0.4/man/prolog/
[DIR]  ftp://ftp.mathcs.emory.edu/pub/prolog/
[DIR]  ftp://ftp.cict.fr/pub/lang/prolog/
[DIR]  ftp://ftp.nstu.ru/pub/sources/docs/prolog/
[DIR]  ftp://ftp.swb.de/pub/docs/news.answers/prolog/
pkg://buddy-2.2.tgz:370071/buddha-1.2/examples/large/  downloads[DIR]3  buddy-2.2.tgz/buddha-1.2/examples/large/prolog/
pkg://chasen-base-2.2.8.tgz:338180/share/chasen/  downloads[DIR]3  chasen-base-2.2.8.tgz/share/chasen/prolog/
pkg://chasen-base-2.2.9.tgz:103716/share/chasen/  downloads[DIR]3  chasen-base-2.2.9.tgz/share/chasen/prolog/
pkg://chasen_2.2.9-3_arm.deb:370386/usr/share/doc/chasen/  info  downloads[DIR]3  chasen_2.2.9-3_arm.deb/usr/share/doc/chasen/prolog/
pkg://chasen_2.2.9-3_i386.deb:369424/usr/share/doc/chasen/  info  downloads[DIR]3  chasen_2.2.9-3_i386.deb/usr/share/doc/chasen/prolog/
pkg://chasen_2.2.9-3_powerpc.deb:370796/usr/share/doc/chasen/  info  downloads[DIR]3  chasen_2.2.9-3_powerpc.deb/usr/share/doc/chasen/prolog/
pkg://chasen_2.2.9.orig.tar.gz:578258/usr/share/doc/chasen/  downloads[DIR]3  chasen_2.2.9.orig.tar.gz/usr/share/doc/chasen/prolog/
[DIR]  ftp://ftp.uniovi.es/pub/linux/devel/lang/prolog/
[DIR]  ftp://ftp.cs.nott.ac.uk/sites/rtfm.mit.edu/pub/usenet-by-hierarchy/comp/answers/prolog/
[DIR]  ftp://ftp.cs.nott.ac.uk/sites/rtfm.mit.edu/pub/usenet-by-hierarchy/comp/lang/prolog/
[DIR]  ftp://ftp.padua.org/pub/linux/Mirrors/sunsite.unc.edu/devel/lang/prolog/
[DIR]  ftp://ftp.padua.org/pub/doc/news.answers/prolog/
[DIR]  ftp://ftp.padua.org/pub/linux/Local/compilers/prolog/
[DIR]  ftp://sunsite.mff.cuni.cz/MIRRORS/metalab.unc.edu/pub/Linux/devel/lang/prolog/
[DIR]  ftp://ftp.trailing-edge.com/pub/oakcpm2/cpm/prolog/
[DIR]  ftp://clr.nmsu.edu/CLR/tools/programming/prolog/
[DIR]  ftp://ftp.nvg.ntnu.no/pub/mirrors/metalab.unc.edu/devel/lang/prolog/
[DIR]  ftp://ftp.cs.cuhk.hk/mirror/ubuntu/pool/universe/c/clp/prolog/
[DIR]  ftp://ftp.ntnu.no/old/pub/languages/prolog/
[DIR]  ftp://ftp.cs.uu.nl/pub/.snapshot/hourly.0/NEWS.ANSWERS/prolog/
[DIR]  ftp://mud.stack.nl/pub/prolog/
[DIR]  ftp://ftp.math.uic.edu/pub/yuedong/prolog/
[DIR]  ftp://ftp.cs.uu.nl/pub/.snapshot/hourly.1/NEWS.ANSWERS/prolog/