I'm a huge fan of Windows Live Writer.
There's only one problem with WLW. The first W.
So I've long hoped someone would clone WLW for OS X. It doesn't have to be as good as the original, a reasonable clone would be a joy.
Unfortunately, the closest thing to WLW for OS X is ecto, and I'm saddened to find it hasn't changed since October of 2007.
It still has one fatal flaw for use with Blogger. It requires that Blogger blogs have "convert line feeds" disabled.
If that feature is enabled (default behavior) then Ecto posts have extra line feeds. If it's disabled existing posts lose their paragraph formatting.
There are other issues with Ecto, such as the way it retrieves Labels (it just looks at Labels on recent posts), but this one is a killer.
Won't anyone please try to clone Windows Live Writer? I mean, I know there's no market out there but ...
Oh, right. No market.