This example shows how you can write in Korean (Hangul) characters in LaTeX with the CJK package, and particularly the CJKutf8 style. The CJK package is a modern alternative to the older HLaTeX (and hangul.sty) packages, with support for pdflatex and unicode.
pgf-pie is a LaTeX package for drawing pie charts (and some interesting variants on pie charts) with the PGF/TikZ graphics package.
The examples in this document are from the pgf-pie manual, version 0.2.
The source code for pgf-pie is available at http://code.google.com/p/pgf-pie/.