Atlanta Hawks : Millsap is sure to exercise his player option – will Hawks let him go or try to re-sign? I expect the latter – preferably via sign&trade. They are an aging team not able to get over the hump of real contend-hood as they are constructed now and keeping Millsap (including just keeping his cap-hold in books) will prevent any moves to improve in free agency (they would be above the cap).
Without Millsap, they can easily retain the rest of their free agents if they wish. That means that RFAs Hardaway & Muscala stay (barring some other team paying apeshit for them) while Sefolosha is likely to be released as he is too old to make sense for a re-building team.
Free agents available : Millsap, Sefolosha, Ilyasova?
Boston Celtics : In a great position of having max.salary cap-space and a contending team for free agents to like... They can even likely retain at least two out of three from free agents to be : Amir, Olynyk, Jerebko.
The rumors that they will go all-in for Hayward seem sensible enough – failing that, I could see f ex Gallinari + PJ Tucker fitting into C's salary room. Blake Griffin as a dark horse?
Free agents available : Only whomever is deemed surplus... Gerald Green James Young
Brooklyn Nets : Some light at the end of the corridor? They got a full roster, no one to renew, some 25 mil in salary room and couple of non-guaranteed contracts to shed if opportunity presents itself.
Additionally – they basically are open for improvements in ANY position barring maybe the center (and youth movement would be welcome even there). Look for Brooklyn to actively chase ”value-deals” on capable players at 10-mil range who somehow slip thru' cracks...
Free agents available : Nothing to interest ANYONE!
Chicago Bulls : Will D-Wade stay or exercise his player option? That is a 24 Mil question which everything basically rotates around... Seems improbable/impossible any team would fork such money for Wade in free agency anymore, but once-great players often have still-great egos so maybe Dwyane really believes he can both a) make that money and b) play for contender. 50/50-situation IMO.
If Wade stays, Bulls are probably best served to stay pat for a year, let the disastrous Wade/Rondo -experience run out and recharge in Summer'18.
But if Wade bolts??? Bulls would suddenly have 40+ Mil in salary cap, still got Jimmy Butler as a ”selling point” & only Rondo as a ”contract albatross”. That would be a nice base to try for an immediate turn-around.
Free agents available : Probably quite a few – I don't see Bulls fighting to keep Mirotic or MCW. Overpay/speculate just a little bit and any of them is available. Anthony Morrow is on a way out of the league.
Charlotte Hornets : The most boring free-agency team around. Way above the salary cap – so not in play. Way below luxury tax – so no panic. No free agents to mention.
That is not to say that Hornets may not look to spice things up with some trades – but as far as free agency go, they are absolutely irrelevant both as a bidder and loser.