Luton Town have released nine players including midfielders Jake Howells and Alex Lawless.
Howells, 25, made 334 Hatters appearances after coming through their youth ranks and 31-year-old Lawless played 203 games for the club.
Paul Benson, Isaac Galliford, Scott Griffiths, Ryan Hall, Mark Onyemah, Luke Trotman and Curtley Williams will also leave at the end of their deals.
Zane Banton and Pelly Ruddock Mpanzu have been offered new contracts.
Meanwhile, the Hatters have taken up the one-year option on Craig King's contract and defenders Mark O'Brien and Magnus Okuonghae and midfielder Matthew Robinson have been placed on the transfer list.