ftp.nice.ch/pub/next/developer/languages/prolog

elk-prolog.d.tar.gz
[Browse elk-prolog.d.tar.gz] 

elk.1.2.s.tar.gz
[Browse elk.1.2.s.tar.gz] [README for elk.1.2.s.tar.gz] 

sbprolog.3.1.s.tar.gz
[Browse sbprolog.3.1.s.tar.gz] [README for sbprolog.3.1.s.tar.gz] 

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.