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.
A library written in Objective-C for linux or others gcc-enabled systems that brings support of slots and signals ŕ-la Qt in the language, and a windowing toolkit made in OpenGL or X11. Other useful tools may also be included such as XML.