This is a Offline blog editor from Microsoft.
To say in a short and simple way- Its Awsome.
First get a copy of the latest 2011 copy of this software.
Though it will ask you to install the Live Essentials,you can skip few,but you cant skip others.
It will update some of the existing soft wares on your system like Messenger and install few like Silverlight .
Well It takes pretty long to complete the installation and download stuff
Here you go with some of the screenshots.