ALS Prolog
A commercial Prolog implementation for DOS originally introduced in 1985 that was later ported to sundry UNIX like systems, Apple Macintosh and MS Windows and has since been open sourced. It features an incremental native code compiler, a two way C and Objective-C language interface, a source code trace debugger and more.
The package is primarily a intended for use with the command line but does come with Tcl/Tk based windowed user interface.
Links
Licence
Originally a commercial software package release under a proprietary licence, currently an open source project released under the MIT Licence.
Publisher
- Applied Logic Systems, Inc.