Windows Live writer is an excellent WYSIWYG Editor for blogging. The Features are:

Ability to automatically ping to popular blog aggregators every time you publish something.
Supports all the famous weblog’s.
Edit offline.

How to Use:

Step 1: Download windows live writer.

Step 2: The installer asks for type of weblog, if the type of you weblog is provide select that, or provide home page address of your weblog, live writer then performs some checks and asks for user name and password. Provide username and password.

Step 3: All set. You can now go to gallery and install your favorite plugin’s.

The interface is very good. I liked it pretty much. This is a must have for a blogger.

Screenshot