JustBlogIt with a simple right-click.

JustBlogIt with a simple right-click.: "JustBlogIt supports posting to a variety of weblog system types and is not specific to just one. You can also use the Custom... setting to add any weblog type you want.

More importantly, JustBlogIt supports seamless posting from within many web-based News Readers. JustBlogIt checks to see if you are trying to post from a News Reader and adapts the blogging data accordingly."