I bought LinkCentral the first time they appeared on AS and i was pleased with it.
It's complete, well designed and the latest updates are good, we can even use it to create a basic Biolink page with a simple and nice design.
I'd love to see more options to this feature, but their "core" is the link management and it shines on that department.
If you're a WP user, it's not to be missed!