I would like to recommend this product from Microsoft, I think its a great tool for blogger's,who have multiple blogs to manage, you can configure all your blogs, it supports almost all the blog service providers, and you can do a lot more to your posts here, you can write your post offline. here is the link check it out Windows Live writer.
Some features:(courtsey Wiki)
Windows Live Writer is a desktop blog publishing application. It features What You See is What You Get (WYSIWYG) Authoring, Photo Publishing and Map Publishing.
Windows Live Writer is currently compatible with:
- Windows Live Spaces
- All blogs that support RSD (Really Simple Discoverability)
- MetaWeblog API
- Moveable Type API
- Community Server
Windows Live Writer introduces the Provider Customization API that enables both rich customization of Windows Live Writer's behavior as well as the opportunity to add new functionality to the product. Currently Windows Live Spaces, WordPress, and TypePad have all taken advantage of this API to expose additional service-specific features within Windows Live Writer.
Windows Live Writer is available in 6 different languages.