Red Sweater Software has introduced MarsEdit 2, a major upgrade to its blog publishing software.

MarsEdit 2 offers an improved user interface and integrates support for Flickr photo sharing for the first time. The software also introduces a selection of post-editing macros that may be of use to bloggers.

MarsEdit allows bloggers to manage one or more blogs from their Mac desktop, rather than through a web browser. This version also introduces support for adding categories and editing URLs in blogs.

"MarsEdit is indispensable for me," said Guy Kawasaki, cofounder of Truemors.com and noted Mac evangelist. "This is a terrific update to an already terrific product."

A free 30-day trial of the $29.95 software is available.