Adding latest post from one blog to another as “news”

Hi everyone.
I have a question and I hope that someone can help me with.
I have 3 blogs and I want to place a category in each blog’s sidebar with links directing to the latest posts from the other two. Like a “Latest News” section from the other two blogs. So every time I write a post in one of the blogs, a link to it will be placed in the other two.
So if you know a plugin or a code for this will be great.
Any help will be really appreciated!