Syntax Highlighter: code formatting for WLW
Syntax Highlighter for Windows Live Writer is touted by the developer as a "simple" plugin.
Based on Wilco Bauwer’s Syntax Highlighter it of course can be anything but simple.
Unlike CodeFormat there is no CSS styling. Styles are written out inline. So a good chunk of code might get a bit bulky but in general inline in this case is as good as external.
<?php echo 'Excellent plugin!'; ?>