Windows Live Writer
WLW is one of those applications that I wish I had back when Blogger.com was still THE thing to use for blogging. It just makes posting so much easier with its ability to use plug-ins. With the help of MetaWeblog API, it's also able to post media (photos, video, etc.) without the need for FTP.
Here's one particular plug-in that's very handy for posting code: Code Snippet
Tags: Beta, Blogging, Live, Live Writer, Microsoft, Software, Windows, WLW