Leo Fortune-West is the highest-profile casualty of Cardiff's promotion to Division
Fortune-West will not be offered a new deal at Ninian Park
He is out of contract and has been released by the club, manager Lennie Lawrence saying that he has already had more than 10 enquiries for the player.
Gareth Ainsworth and Steve Jenkins - both recruited on short-term contracts towards the end of the season - have been told
that they can talk to other clubs, although Lawrence says he may want to keep the pair at Ninian Park if budgets allow.
Former Wales defender Andy Legg has been offered a new one-year contract.
"I think he deserves it," Lawrence told BBC Sport. "He was massive in the play-offs and came up trumps when it mattered."
Des Hamilton and Layton Maxwell have been told that they can talk to other clubs, although both remain under contract.
Martyn Giles, Tony Wallis, Simon Heal, Andy Jordan, Mark Walton, Fan Zhiyi and Gethin Jones have all been released.
Jones has been told that if he cannot find another club he would be welcome back at Ninian Park next season.
Lee Fowler has returned to Coventry City after a loan spell at Ninian Park
Lawrence could look to recruit up to 10 players in the summer, although he says reports of a £10m budget have been greatly exaggerated.
He said the club's activity in the transfer market to build a squad for the First Division next season will be based on a policy of "quality, not quantity".
"Obviously we want to strengthen and give ourselves a chance to have a go at it," said Lawrence.
"Sam Hammam (owner) will decide what the budget is and then we'll talk about what we'll do with it."
The club have taken on six new first-year professionals, Byron Anthony, Danny Thomas, Kirk Huggins, Michael Parkins,
Nicky Fish and Richard Ingram.
Cardiff will play three matches on a pre-season tour to Sweden and Denmark in July.
They will face Koge BK (19 July), BK Ferm (21 July) and IFK Malmo (23 July).
When they arrive home the Bluebirds will face Cambridge Utd (away, 26 July, 1500 BST), Cheltenham Town (away, 29 July, 1945 BST), Charlton Athletic (home, 1 August, 1945 BST) and Forest Green Rovers (away, 5 August, 1945 BST).