List of dofollow blogging platforms & adding "dofollow" anchors HTML

Hi guys, can anybody refer to a list of dofollow blogging platform. And by that I mean not dofollow comments, but dofollow links in the body.

For example Blogger and Wordpress are by default are no-follow in comments, Blogengine is dofollow. What about in the body? I can't see it in their code - not technical enough.

What if I won't bother about how they setup and just create anchors like this:
<a href=”link URL” rel=”dofollow”>link name</a>

will it make a link always dofollow no matter what is the default of the platform on which I am posting, web 2.0 etc...?