Windows Live Writer is a desktop application that makes it easier to compose compelling blog posts using Windows Live Spaces or your current blog service. For Windows Live Writer I created a plugin called SyntaxColor4Writer that enables you to embed syntax highlighting in your blog posts. More details about SyntaxColor4Writer can be found here. This is how the plugin looks:

This is an example of a xml fragment generated by SyntaxColor4Writer:

<system.web>
   <compilation defaultLanguage="VB" debug="true" />
   <customErrors mode="RemoteOnly" />
</system.web>