Quick Look: Mac OS X Desktop Blog Authoring Clients
meanderingpassage.com/2007/07/25/quick-look-mac-os-x-desktop-blog-authoring-clients
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
If you want the ability to create your blog posts off-line, later posting them quickly to a single or multiple blogs, a desktop blog authoring client may be the right fit for you. An off-line blog authoring client can also give you enhanced spell-checkin