Hello,

After about 13 years (!) I went back to Prolog and released a new 
update, with some major refactoring, which loads fine in 6.0.

It's there:
http://www.zogotounga.net/comp/squeak/prolog.htm

and on SqueakMap:
http://map.squeak.org/package/cb6c7afe-d517-470f-8857-d764ef321725/autoversion/21

BTW I noticed on SqueakMap that the licence is SqueakL from Disney
It is possible to make it MIT? What would it take?

Stef