I will give you a free link on my PR5 link page at http://www.postmedai.com and it is legit pr5. I am only going to allow 50 links at most. You need minimum of pr1 to get a free one. I am sure it will provide some positive link juice to your site.
I can't believe we are still talking at "free links" or "links" at all for the matter heading into 2014. Garbage backlinks are becoming less relevant by the day. But, you put your link on the page and three months later you will be crying about not being able to find your site on Google.