Manchester City defender Jason Denayer has joined Turkish club Galatasaray on a season-long loan.
Wolfsburg have signed German World Cup winner Julian Draxler and Bayern Munich defender Dante for undisclosed fees.
West Ham have signed midfielder Alex Song on a season-long loan from Barcelona.
Italian champions Juventus have signed Brazil midfielder Hernanes from Serie A rivals Inter Milan for £8m with £1.5m add-ons.
Inter Milan have signed former Juventus midfielder Felipe Melo from Galatasaray for £8m with a further £1.5m add-ons.
Midfielder Olivier Kemen has left Newcastle to join French side Lyon
Sunderland forward Emanuele Giaccherini has returned to Italy to join Bologna on loan for the rest of the season.
Stefan Scepovic has left Celtic to join the Spanish La Liga club Getafe on a season-long loan deal.
Cardiff City have signed striker Idriss Saadi from French second division side Clermont Foot.
Bournemouth have agreed a fee of £5m with fellow Premier League side Crystal Palace for striker Glenn Murray.
West Brom forward Brown Ideye has joined Greek champions Olympiakos.
Norwich City have signed DR Congo international Dieumerci Mbokani on a season-long loan from Dynamo Kiev