Robert B. K. Dewar and the other copyright holders have released MACRO SPITBOL under the GPLv3 license.
The project is hosted at Google Code: spitbol.
Here is the email exchange earlier today that resulted in the release of the code:
Robert,
I found a copy of V37.MIN in my copy of MACRO SPITBOL from Mark Emmer that I acquired [...]
I have started a new Google Code project, setl, to pursue work on SETL.
The immediate goal is to provide a high-quality SETL compiler, based on Python and written in Python. The project will also attempt to collect many algorithms written in SETL, including, for example, an executable specification of Andrew “Tridge” Tridgell’s rsync algorithm.
Simply [...]
I have just started a new group at LinkedIN, SETL Programming Language.
Simply put, SETL (SET Language), is the best programming language yet created. Based on the theory of finite sets, it allows for the executable specification of algorithms at a very abstract level. SETL permits specifying the essence of an algorithm in its purest [...]
I have just started a new group at LinkedIN, SPITBOL.
SPITBOL is the best-ever implementation of the SNOBOL4 programming language. SNOBOL4 is as entertaining as it is powerful. Once you learn SNOBOL4, no other language will command as much respect or will give you more fun.
Professor Robert B. K. Dewar of the Courant Institute of [...]