I was just looking over the PFT top 100 free agents and saw some interesting names still available. They may not be studs but quality depth and a few playmakers.
http://profootballtalk.nbcsports.com/2012/03/13/the-free-agent-hot-100/
http://profootballtalk.nbcsports.com/2012/03/13/the-free-agent-hot-100/