I'm looking for a simple software in which I can create both Blogs and Articles. I know I can always simply post my articles as blog entries, but it is nice when you have a clear separation of articles and blog entries, for example, not allowing comments, custom ordering (not by date), another set categories, different layout, etc.

So, I want a software that allows me to post both blogs and articles.
Any recommendation ?

You can do articles with WordPress.
http://wordpress.org/
In Wordpress it's called "pages" but you can put anything you want on the page so...On my blog I use pages for photos and text.

Thanks !