Examples of powerful LaTeX packages and techniques in use — a great way to learn LaTeX by example. Search or browse below.

Example: Theorems and Proofs
Example: Theorems and Proofs

Quick tikzpeople example
The tikzpeople package by Nils Fleischhacker provides people-shaped nodes in the style of Microsoft Visio clip art, to be used with TikZ.
LianTze Lim

Chinese: A Visit to Qiantang Lake in Spring (钱唐湖春行)
This example shows how to write simplified Chinese characters in LaTeX with the CJKutf8 package. WriteLaTeX includes a full set of fonts for simplified Chinese, and we use utf-8 encoding, so you can type simplified Chinese characters directly into your LaTeX source code and have them appear in the output.
Bai Juyi

Example: Custom Nimbus TTF Font
Example: Custom Nimbus TTF Font

Bibliographies
Bibliographies

Provmall
Provmall
Mattias Andersson

Polarizing microscope
Polarizing microscope

Table cells with diagonal lines
This example demonstrates how to produce diagonal lines in table cells using the slashbox and diagbox packages.
The diagonal line produced by the slashbox package is rather jagged and unwieldy.
The diagbox package does a better job in general.
Try loading only one of these packages to see
the difference — if diagbox is loaded at all,
it overrides slashbox's behavior./p>
LianTze Lim (using sample text from slashbox.tex)

Jess's mathematics
LaTeX is the best way to write mathematics. It completely pisses all over Word. However, it does take some time to get used to so might not be worth your while if you won't write too much. The way I use it is to first download and install a latex editor and then get writing, but I would recommend that you use this website instead since you can get going a lot quicker. The upshot of the whole business is that you type in here and then a pdf is generated with all the equations looking ace. I'll give you some examples.
samuelpgroth@gmail.com