NCSA Mosaic on GitHub
github.com
github.com
http://vaxa.wvnet.edu/vmswww/vms_mosaic.html http://simh.trailing-edge.com/ http://www.openvmshobbyist.org/ http://www.decuserve.org/
Total cost of this nostalgia is US$30 for the OpenVMS VAX CD. Mosaic, simh and the OpenVMS Hobbyist licenses are free.
Nostalgic!
Mosaic at one point was used by a majority of web users and look now- no one cares about compatibility. People moved on and it is no longer in current use and no one would expect that your site should display properly in it.
(The source code is good reading nonetheless. I love the PUBLIC macro to declare public "methods" in libwww2. A little C++ jealousy, I guess.)