XGP is an integrated development environment that extends GNU Prolog to work with Cocoa under Macintosh OS X. It provides user interface and graphics facilities largely compatible with MacProlog32 by LPA. Requires Mac OS X version 10.2.1 or greater.
ProLOGO is a LOGO-like language written in swi-prolog with XPCE graphic libraries. Almost all the basic commands are implemented but there is no support for procedures (yet).