Syntax hilight 30 languages, 2 dozen themes to choose from. Uses the SHJS syntax hilighter.
There are 2 ways to include your code:
Technique 1 Inside <pre name="code" class="sh_java"></pre> just as you would normally use SHJS.
Copy your code into a file on your server.
In your posts pass the webroot relative path and language like this:
The supported languages, etc. are detailed on the Settings->SHJS Syntax Hiliter page.
Additional usage instructions can be found on codezach