I have been very impressed with these plugins for my Windows Live Writer.
Code Snippet: Which actually format your code to different languages.
Tag Generator: Generate Tags based on the content you have edited
Table Plugin: Customized table creator
Insert Object: We can insert upto 3 files (Note: Blogger doesn’t support this)
Clipboard Live: Allows us to paste images, HTML pages, source code etc.
There are lot of plugins available for Windows Live Writer.
Please go through the complete list of plugins
Please send your feedback and comments to firstname.lastname@example.org