As you know I’m working on improvements of Python Markdown implementation in terms of Google Summer of Code 2008. Markdown is a markup language, which was originally created by John Gruber and Aaron Swartz, and implemented in Perl. Today there are a lot of different Markdown implementations, for almost all popular languages. The main aim of markdown — maximum readability, markdown is simpler than (X)HTML and widely used in different services, where users can publish some texts(i.e blogs, in some blogs users can write comments/posts, using Markdown).