This plug-in makes WP-Syntax highlighted code snippets downloadable from nice captions.
wp-syntax-download-extension directory to the
Activate the plugin through the 'Plugins' menu in WordPress. Of cource you have to have WP-Syntax activated as well.
Add an attribute
filename="filename.ext" to the
lang="..."> snippet that you want to make downloadable.
Adjust the design of captions with CSS via admins menu.