Im not a huge NFL.com fan as far as getting interest because they are usually just a step behind PFT or Rotoworld, but this is a nice compilation they have setup for some quick knowledge. It shows the free agent and the teams rumored to be interested. One reason I like this link is because NFL.com likes to confirm the info before posting, so I feel the info is fairly accurate considering all of the rumors.
http://www.nfl.com/freeagency
http://www.nfl.com/freeagency