TeX/LaTeX rock.

I mostly use LaTeX (which uses Donald Knuth’s TeX as its typesetting engine) for writing letters to friends, but it has tons of other uses as well.

TeX’s typesetting is incomparable to a standard word processor! Its justification/hyphenation algorithm is superior to MS Word in my opinion, especially when paired with the microtype package.

Any of you who use it? Let me know in the comments below.