List of emulators and/or OSes available to hobbyists?

[Al Kossow]

 > I've also started the following webpage (and am looking for  
additional
 > links).

http://www.mess.org/main.php

There are several non-micro emulations in there, including PDP-1 TX-0  
and 990/10

http://www.cozx.com/~dpitts/ibm7090.html
http://www.cozx.com/~dpitts/ti990.html

Dave Pitts' 7090 and TI990 pages

http://www.unlambda.com/

Brad's Lisp Machine pages