Chris Boswell is a restricted free agent, but I think he should be tendered at a second-round level. He was outstanding this year with many game-winning kicks and an all-around pro bowl season.
Jordan Berry is a restricted free agent but should not be tendered. Punters can be found on the free agent market inexpensively. I would bring him back with no guaranteed money to compete for the punting job.
Kameron Canady was an exclusive rights free agent that was signed and will compete again for the long-snapper job. The difference this year is that he has the upper hand having been successful in 2017.