Out of all these free agents, Jenkins is the only one who will command a high salary. As others have said, the Packers could franchise him, but I wouldn't be surprised if they let him walk. He is 30 and has a long injury history, and Mike Neal is the heir apparent at his position. I'd love to have him back, but how much money should be spent on him?
I don't see Jackson getting any big offers in free agency. He's more valuable to the Packers than anyone else. Jones may be in the same boat. And I agree with others that Peprah is more valuable than Bigby, and he should also come cheap.
They didn't mention Donald Lee. I think he's a free agent, and even if he's not, his level of play has declined so much in the past few years that I doubt he will be brought back. I don't know what happened to him. He's just a really bad player now.