Free agents are still available for NFL teams to sign in 2012, and this list ranks those players.
For one reason or another, these players haven't been picked up yet despite voluntary camps beginning.
In the case of the top-ranking player on this list, a contract has been proposed, but not signed.
Currently, most of them are merely waiting to hear from teams or make a decision.
Expect several to make an impact on the team which signs them this year.
(Disclaimer: This list includes all positions except offensive linemen.)