Arena: W3C's HTML3 browser
 - A browser to render documents conforming to the HTML+ specifications which he worked on. HTML+ is now known as HTML3, and Arena's primary purpose is still to be a testbed for HTML3 documents. 
Chimera
 - a World-Wide Web browser with an X/Athena graphical interface. 
Lynx
 - full-screen text-based web browser 
MidasWWW
 - A Motif/X based WWW browser. 
NCSA Mosaic 
 -  an Internet information browser and World Wide Web client. NCSA Mosaic was developed at the National Center for Supercomputing Applications at the University of Illinois in Urbana-Champaign.  
OmniWeb
 - our World-Wide Web browser for NEXTSTEP. 
Secure NCSA Mosaic
 - Web client with encryption and authentication enhancements. 
XBrowser
 - an X/Motif browser for the public domain HP-UX archives.  XBrowser (site #2)
 -  XBrowser (site #3)
 -  XBrowser (site #4)
 -  XBrowser (site #5)
 -  XBrowser (site #6)
Netscape
 - Netscape Navigator brings Web exploration, email, newsgroups, and FTP capabilities together in one package.