This is a little known project in the works by Mozilla, and is a continuation of the original Mozilla Browser. It supports all of the same add-ons as Firefox, and is fast as hell, so if you are having trouble with Firefox because your computer is a turd or Firefox can't play EMBED files, then check this one out. It comes with all sorts of components like the old Netscape Communicator did, but you can go browser-only, which is what I did. It doesn't have as many skins as Firefox did, but it comes with classic and modern skins that resemble previous Netscape builds (classic resembles the real old Netscape Navigator builds, and modern resembles Netscape 6, which is probably my favorite Netscape design. http://www.mozilla.org/projects/seamonkey/
I used to use mozilla, but I switched to FF for a reason.
Plus, SeaMonkey is such a lame name.