I would like to solicit links from a small business marketing site. I think it uses nofollow, but its robots tag is
<meta name="Robots" content="All" />.
How do I tell if it is a dofollow site or nofollow site?
There is no such thing as
dofollow, if you can't find either
nofollow on the page or site then it is assumed that all links are follow.
You can tell if a site is no follow by viewing the source code and searching for
nofollow, if you can't find it within
rel="nofollow" then all links on that page are follow. You can simplify the process by using a browser addon, I coded a simple FireFox plugin several years ago that allows users to simply hover over a link and find out if it uses nofollow, I have no idea if it still works but in theory it should because the code is very simple.
If your looking to automate the process and harvest these details in bulk then you will need to visit a black hat forum or something, its not something that any normal application or browser will do for you.