Blog add on or plug in

I would like to add a blog that allows comments and maybe add a photo Using RapidWeaver 7. WordPress added to site seems complicated. I need a very simple drag and drop that will allow visitors to post and react to discussions. thanks, urgent to complete the web site. Ron N

Probably the best blog option on RW is the Poster stack:

This stack only allows you to create posts in RW, but visitors can comment via Disqus.

If you want visitors to create their own blog posts then Armadillo or TotalCMS are likely your best options.