MiKTeX is an up-to-date TeX implementation for the Windows operating system.

TeX is a typesetting system written by Donald E. Knuth, who says that it is "intended for the creation of beautiful books - and especially for books that contain a lot of mathematics".

MiKTeX offers a complete set of utilities, macro packages and fonts, e.g., LaTeX, pdfTeX, ConTeXt?, just to name a few.

http://www.miktex.org