> > Is it the BASIC STAMP1 Software Freeware?

No, not exactly.  You can download the software, documentation, and
instructions for making the connecting cable for free from Parallax
(www.parallax-inc.com).   While the SW is normally a commercial product,
parallax's primary interest is in selling stamps, and this is something
they do to lower the entry cost for hobbyists and very small companies.

I think it's very nice of them.

Parallax also maintains a separate mailing list "just about stamps".

BillW