Obviously the Steelers don't have much money to throw around in FA (none as of now). But here are 14 players I think the Steelers could possibly target (in no particular order)

1. Josh Johnson, QB, Tampa Bay (26) - Johnson is a young QB prospect who would be a very solid backup. He is mobile and can make most of the throws.
2. Chad Henne, QB, Dolphins (27) - Basically see Johnson
3. Khalil Bell, RB, Chicago (25) - Bell closed the season well and with his youth and potential, he could be a player the Steelers target for a small, multi-year, back loaded contract.
4. Josh Morgan, WR, 49ers (27) - Morgan seems like a decent slot WR and if we can't bring back Cotchery (who I want back) we could sign Morgan for a similar deal
5. Demetrius Bell, OT, Buffalo (28) - Bell had a great year allowing just one sack in six starts. The Bills are deep at OT and Bell has a history of knee injuries so we might be able to get him cheaply. If he could start at LT that would be huge for the Steelers.
6. Anthony Collins, OT, Bengals (26) - Collins has been a backup for the Bengals but the truth is he could start on a few teams and the Steelers are one of them. He could be had for a close to the minimum contract.
7. Kraig Urbik, G, Buffalo (26) - Maybe Colbert could fix the mess he made out of Urbik and get him back. Urbik was one of the top guards in the NFL last year but won't be valued as one because he is kind of a one year wonder. If we could get him for 3-4 million a year for 3 years, we should do it.
8. Vernon Carey, G, Miami (31) - Carey is a good pass blocker (only gave up 3 sacks all year) and does not commit penalties (only 1 all year). He would be a solid stop gap guard while we groom a replacement.
9. Shaun Ellis, DE, New England (35) - Ellis had a decent year for the Patriots and for the veteran minimum, he could be the 4th DE that we need on this roster. He could also mentor our younger DEs and be a strong locker room presense.
10. Sione Pouha, NT, Jets (33) - If the Steelers don't want to have a rookie NT starting, Pouha could be the best option. He is up their in age but can still ball and for a $3 million dollar a year contract for 2 years, he could be the stop gap NT we need to groom a replacement.
11. Sammie Lee Hill, NT, Detroit (25) - Hill is massive at 6-4 330 pounds and is actually a pretty good pass rusher. If we could sign him, he could be our long term starter.
12. Larry Grant, ILB, 49ers (25) - Grant has been a backup to Patrick Willis and Navarro Bowman and he fits great in the Steelers scheme. If they can get him away from SF, that would be awesome.
13. Connor Barth, K, Tampa Bay (26) - Barth is one of the better kickers in the NFL and has a great leg. He might require to much money though
14. Nick Folk, K, New York Jets (27) - Folk rebounded from an average year in 2010 with a very good year in 2011. However, the Jets have too many bad memories with him and might let him walk. He is a much cheaper alternative to Barth.
15.