A Few options:
-Mike Sims-Walker, WR: could come cheap and would be a need if they don't draft a receiver in the 2nd.
-Jason Trusnik, LB: Team player who will contribute on special teams and linebacker, both inside and outside
-John Kuhn, FB/Heath Evans, FB: They'll probably upgrade from sammy morris. Evans has stated his desire to return to the patriots but Kuhn is the more attractive option.
-Sidney Rice, WR: He will test free agency and fits what the patriots need but it is quetionable whether or not the patriots will pay him.
-Alan Faneca, G: They could use another guard and Faneca still has a lot in the tank.
-Cullen Jenkins, DE: Like Rice, I don't know whether the Patriots would pay him what he wants but he fits perfectly as a 3-4 end.
-Mathias Kiwanuka, DE/LB: Kiwanuka has played some outside linebacker for the giants and I think he could really excel for the patriots as a pass rushing outside linebacker.
-Reed Doughty, S: Solid depth at safety.