To summarize . . .
Mozilla: Ongoing open source development platform project to create a
cross platform internet applications suite made for testing purposes and
other development projects. Not generally designed for casual end users.
Netscape 6.x-7.x: Commercially packaged freeware browser suite built
from the Mozilla codebase, with proprietary add-ons made for end users.
Beonex: Freeware browser suite built from the Mozilla codebase, but
with no proprietary or commercial add-ons. Designed for end users.
Phoenix*: Stripped down and reworked version of the Navigator browser
component of Mozilla. Much smaller download than it's big brother, but
with more customisation options. Not generally designed for casual
end users, but is still in the early stages of development.
Galeon and
Skipstone: Standalone browser projects built for Linux
systems that require some version of Mozilla to be pre-installed.
K-Meleon: Standalone browser for Windows, with a native UI, but
contains Mozilla's Gecko rendering engine for browsing webpages.
Chimera: Standalone browser for Mac OS X, with a native UI, but
contains Mozilla's Gecko rendering engine for browsing webpages.
*As was mentioned earlier in this thread, the Phoenix project is due to
be renamed soon, due to BIOS maker, Phoenix Technologies, accusing
the developers of the Phoenix browser of infringing their trademark.
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01 (CK-DJGM-i.net)
SeaMonkey = Swiss Army Knife: It's versatile, reliable, and contains useful tools.
Windows Internet Explorer = Old Swiss Cheese: Full of holes, and it stinks!