The not so Short Introduction to LaTeX2e in your native language: written by Tobi Oetiker. From this document you will learn all you need to know about LaTeX. It will enable you to write your documents with this great tool.
The universal cross-platform LaTeX editor texmaker is a program that facilites processing your LaTeX documents. Lyx is the well-known graphical LaTeX document processor freely available for all major OS (open-source software).
The root of the Comprehensive TeX Archive Network directory tree.
The TeX Users Group (TUG) Web site.