SEO Smart links have been praised all around the web and even by me, but its not so smart when compared to another plugin which does the same work.
This plugin very rarely links posts related to keywords and sadly it never shows the title of the post on mouse hover. It behaves somewhat like nursery. Strict case matching, slug matching bla bla.. which is not at all helpful.
I found another plugin SEO Autolink and related posts. http://wordpress.org/extend/plugins/seo-alrp/
This plugin does a great job in linking old posts with just keywords in post, also link tags and categories, but I didn't enable them as it was doing great job for just linking posts by meta keyword.
Yes it lacks some options link open external link in new window, adding nofollow tags etc. But the first thing we install the plugin is for that particular thing of linking old posts.
But it has a drawback that when you click on any link, it takes a few more seconds for the response from the server.
Other than this the plugin is awesome.
Links old posts by just meta keyword matching,
Displays title of the post on mouse hover (Like to see in on SEOML)
Simple options page.
No unwanted settings stuff like in SEOML.
I would love to see SMOMLs add those features in future. I'm a unhappy SEO Premium Business pack customer. So thought of posting it here.