Post2blog is one of greatest blog desktop editors from the freeware world. I have first tested this when it was a paid software and I was fully complacent. It was better then freeware ones but not enough to buy it.
About 3 months ago it becomes freeware, I download it and I use it right now, at this post. It has a lot of tools, it is a little bit useful than others, it has its minuses but per total is good.
Upthere is the editor, it has some useful buttons, some general buttons but it has some tools that are not in editing bar like tabel, sub and superscript, pre and others like that.
Adding blogs becames also a very easy proces, all you have to do is to enter your weblog adress, the software will detect your platform (or it should be), or you will choose from a list of plaftorms (a long list).
This editor has a lot of skins too. I love customizating my applications, skins are perfect. It has some design minuses (there is a lot of Times New Roman) but skins help you a lot.
So, this is Post2Blog, a useful, complex, freeware application for bloggers. I love it, I write with it on all my weblogs, it has a lot of tools (more than other freeware or paid desktop editors), developers are still developing at it, it has skins, languages. From my opinions this is the best blog editor, freeware or paid.