For a list of confirmed transfers, check out the transfers page.
Manager Neil Lennon has indicated Celtic may make a move for Wolves and Scotland striker Leigh Griffiths.
Meanwhile, Lennon says forward Mohamed Bangura, who has returned to Celtic following a loan spell at Elfsborg, can leave the Scottish champions.
Hibernian manager Terry Butcher has dismissed suggestions that striker Adam Rooney rejected a move to Easter Road before sealing a deal at Scottish Premiership rivals Aberdeen.
Brian Stockbridge, who has left his post as Rangers finance director, could be replaced by Philip Nash, who recently joined the club as a consultant.
Rangers manager Ally McCoist expects the club's chief executive Graham Wallace to meet with former Ibrox director Dave King about possible investment.
Former Manchester United manager Sir Alex Ferguson says the club will not sack his struggling successor and fellow Scot, David Moyes.
Referees in the Champions League and Europa League will next season use vanishing spray to mark a line which players in a wall must remain behind for a free-kick - if a trial this summer proves successful.