To the OP's question:
WR
Donnie Avery - Fast as hell, would be a good signing to get some speed on the field. I'm interested.
Ramses Barden - No idea. Hasn't had much opportunity in NY.
Domenik Hixon - For a reserve role and that's it.
Mohamed Massaquoi - Awful player. Not worth kicking tires.
Austin Collie - Needs to do his loved ones a favor and find another job.
OT
Jason Smith - Not even Scar can save this one.
Ryan Harris - Marcus Cannon with a more recognizable name.
OG
Geoff Schwartz (OG/OT) - No idea.
Doug Legursky - Awful player.
C
Rob Turner (OG/OT/OC) - No thanks.
Mike Pollak (OG/OC) - Who?
DE
William Hayes - OK player but no thanks.
Wallace Gilberry - Redundant with Armstead and Francis at best.
Matt Shaughnessy - Has some potential. I'd sleep on it.
Andre Carter - He's done.
DT
Sammie Lee Hill - Rather give Pryor one more shot.
Glenn Dorsey - Overrated. Let someone else find out he just isn't good.
Alan Branch - Upgrade over Love and Deaderick but not worth the money.
Ricky Jean-Francois - Don't know much about him.
Terrance Knighton - Good run stuffer but not a fit for what this team needs.
LB
Rey Maualuga - Garbage. Spikes without the talent.
DeAndre Levy - Love to kick the tires.
Larry Grant - Good LB who was buried in SF. Doesn't really fit a need.
Geno Hayes - Not sure. Haven't seen enough.
Brandon Siler - No thanks. Nothing to see here.
CB
Derek Cox - HELL YEAH

Brent Grimes - Very Good player but coming off injury, and playing in a division with small WRs has sheltered him a bit IMO. Depends how much money is involved.
Jerraud Powers - As an Arrington replacement I'd bite.
Captain Munnerlyn - Ellis Hobbs 2.0. As depth only.
Jacob Lacey - Definitely not.
S
Louis Delmas - Only on the cheap. Unreliable player.
Kenny Phillips - If the money is right. Good player.
Chris Clemons - Not sure. Don't know much about him.
Corey Lynch - No.
Jamarca Sanford - Top special teams guy, not really a safety.