Markup language for Linux

[Dj Statik]

Greetings list,

I am wondering if anyone here can give me some pointers on some
documentation about Markup languages for Linux.

What I am after is a Markup language something like HTML where I can create
nicely formatted documents using tags for fonts and formatting, and then use
some sort of converter to output that file in html or pdf, or a word doc.

Any suggestions greatly appreciated as always.