Kilmarnock have secured Simon Ford, Grant Murray, Tim Clancy and Aime Koudou for next season.
Ford - recovering from a knee injury - has until the end of the year to prove himself.
Koudou and Murray get one-year deals with a year's option depending on appearances, while amateur Clancy, 22, has signed a similar contract.
Meanwhile, Gordon Greer is leaving Killie to return to England. Oldham Athletic have been linked with the former Blackburn midfielder.