Like some of these names and have them stashed myself... I'll add some others (in no particular oder).
QBs
Mike Glennon -- is arguably the best one for those in need of a QB, and IMO, unless you have a top-5 guy, might as well keep throwing darts till you hit big on one. Is Glennon going to be a stud QB? Well, probably not, but as
@FF Ninja said, he's shown enough to get himself a shot next year somewhere. Maybe he doesn't enter as a clear cut lead guy, but I'd bet he's in a competition with a mid-round rookie or an older vet. Off the top of my head, IMO he's better than what the Browns, Bears, Texans, 49ers, and Jets are rolling out right now, and you could make an argument for him over Palmer in Arizona and Tannehill in Miami. In fact, Glennon may be an excellent fit with Arians' passing system. Glennon can start in the league, I believe.
Jimmy Garrapolo has already received some press about being the apple of Hugh Jackson's eye. We'll see if that's legit, but he could potentially be traded if NE feels good enough about Brisset behind Brady (or some other rookie they pick up).
AJ McCarron fits the same bill as Garrapolo, but Cinci would need to find a deal they feel is worth passing up a year of a quality backup to Dalton.
RBs
Brandon Wilds -- We all saw what he could do in the preseason for Atlanta, until he got hurt and subsequently released with an injury settlement. He spent most of the year on the Jets practice squad before being added to the active roster last week. Now Forte's banged up, so we may see Wilds get some action down the stretch. Given the Jets cap woes, Forte isn't going anywhere with his $6MM dead cap hit in 2017, but he'll be 33 and is already getting banged up. Powell has a $4.3MM dead cap hit, so he's not going anywhere either. Yeah that seems like a lot of competition, but these things change quickly in the NFL. Plus Wilds could always be released at the end of the year. Remember, Wilds is the guy Matt Waldman said was his next Spencer Ware -- a RB he believed had the skills to be a starter in the NFL when given the opportunity.
Darius Jackson -- FREAK athlete - we all know that, but now he's not buried behind Zeke and Alfred Morris. I think the Cowboys screwed this up to keep one of Jerruh's boys in McFadden, who should be on the street. Dallas apparently wanted Jackson back on their PS, but there were multiple waiver claims, which tell me that NFL scouts still believe this guy's got talent. Cleveland's not such a bad landing spot either -- Crowell is a FA (though restricted), and DJJ doesn't seem to have their trust as an every down back. San Francisco also entered a claim, reportedly, and I've seen rumors there were others. When multiple teams try to get a guy, I pay attention, especially for the price of a roster spot.
Kapri Bibbs -- Could've been cut in some leagues after getting injured and IR'd, thinking the Broncos would just play someone else next year. That's surely possible, and Denver may well choose to draft someone else in search of an upgrade... but Bibbs was flashing, and if he doesn't get a shot in Denver, it's certainly possible someone else in NFL circles was noticing. Denver's not in cap trouble per se, but CJA is pretty easy to let go (only a $1.7MM hit). They could also decide it's best to give Anderson, Booker, and Bibbs another go at it.
Karlos Williams -- More of a longshot, though we've seen what he can do when healthy and in-shape. Could end up as Bell's primary handcuff if DW moves on, or in an even better situation should Pittsburgh and Bell not reach an agreement.
Tyler Gaffney -- Is this the year NE decides to part ways with Blount? Unlikely, but possible...
Terrelle Watson -- Freak athlete again that received some buzz in the offseason. He's actually in Denver now, and could be worth an offseason roster spot.
Andre Ellington -- probably owned as a handcuff right now... but he could be available. I doubt he gets a lead back gig elsewhere, but he's a FA and has flashed in the league before.
Kelvin Taylor / Troymaine Pope -- Guys Seattle has brought in after injuries to Prosise and now Pope. Alex Collins keeps hanging around, yet they keep adding other guys and giving them work ahead of Collins. Rawls and Prosise own this backfield for next year, but that doesn't mean these guys couldn't surface elsewhere.
Malcolm Brown -- More of a pipe dream with this one stuck behind Gurley, but i like the talent and what he's shown with his opportunities. Guys his size with the elite levels of agility that he's posted generally make some noise at some point. He's got another 2 years on his contract, but he theoretically could be traded, or something could happen to Gurley (maybe he's traded by the new administration (stranger things have happened). Unlikely, but his talent bears mentioning.
WR/TEs
AJ Derby -- My favorite TE stash if he's still available... Denver gave up a solid pick to acquire him, and Derby continues to flash. Kubiak's offense has always been kind to TEs, and Derby's in position to take advantage in 2017 and beyond.
Jaron Brown -- I think it's easy to forget that Brown's snaps were increasing and he was seeing more and more playing time prior to his injury. He had practically relegated Floyd to the bench already. Nelson is very small and has a specific role, Fitz has a specific role, and John Brown has health issues as well. It's very plausible Jaron emerges in the offseason to a fairly prominent role in that passing game.
Martavis Bryant -- Shouldn't be available anyway, but you should make sure he isn't.
Tanner McEvoy -- getting a little more action lately... he's a huge target, though the depth chart is really crowded right now. Those things sometimes clear up over an offseason though.
DeAndre Smelter -- Is this still a thing?
Seth DeValve -- as others have mentioned, Barnidge is getting up there in age (32 next year), though he's not going anywhere on such a team-friendly deal.
