Syntax

Syntax - re2 - I define UNIX as “30 definitions of regular expressions living under one roof.” —Don Knuth - Project Hosting on Google Code

http://code.google.com/p/re2/wiki/Syntax list of syntax supported by new regexp lib from google

highlight.js -- highlight your code on the web / blog, etc

http://softwaremaniacs.org/soft/highlight/en/ very good code javascript code highlighting library, easy to implement, comes with wordpress plugin as well.