Contextly. Relevant links for WordPress

Contextly takes a new approach to having relevant links at the bottom of a blog post. Rather than attempting to find links based on the title of the post and the content, it lets you choose them. You can have internal links from the blog and external links as well. The interface is easy to use and the data is stored on their servers.

It only works on single post pages, so click the title of this post then scroll to the bottom to see what it does. I’m impressed, and they tell me many more neat features are coming soon.