Texas.net is what we're talking about. And by software, I mean Solaris source code.
To be perfectly honest: I vaguely recall source of an older Solaris version being passed around the user/hobbyist community, but I wasn't the originator. I'm sure I downloaded it at one point, but don't remember ever doing anything with it OR putting it up for coworkers to browse.
Like the (released and quickly discontinued) version of Solaris 2.6 for PPC that ran on certain RS/6000s, it was "out there" and easily obtainable by anyone in the hobbyist community if you asked enough people.
No idea what was done at TN after I left; I had issues with how management treated the technical staff and resigned in late '98.
It's been 18 years, my memory is a bit fuzzy.