This is a partial list of commercial vendors and other non-free sources of TeX http://www.mackichan.com/: Scientific Word (WYSIWYG front end to LaTeX for.
The LaTeX language has a wide variety of special symbols for which markup commands have already been defined. These range from accents and greek letters.
How about \&? I'm not sure about what you are asking, though Update. This also works fine in XeLaTeX and LuaLaTeX. For example, in XeLaTeX this code.
Proponents embrace LaTeX because of the total control it offers for document layout, or because it represents a blow to commercial software.
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