The ProjectM Blog suite is the ultimate publishing tool for your website
With a focus on simplicity, ease of extensibility, web standards and usability. It includes a great suite of modules for blogging on your site..
The ProjectM blog suite features social bookmarks, Ajax, gravatars, email notification, tag cloud and other great web 2.0 features. Easy to share with Twitter, Facebook, Google+, Pinterest etc. Additionally, the blog supports multiple authors to write posts on the same blog. Visitors can subscribe to the individual author's RSS feed or view only the posts from their favourite author.
On the technical front, the blog supports an extended version of the Blogger API & MetaWeblog API. You can use easily to manage your posts with client programs like Windows Live Writer (WLW).