Southend United re-sign former Yeovil Town centre-back Jakub Sokolik on a five-month contract.
Northampton have signed Swansea winger Kenji Gorre on a half-season loan.
MK Dons have signed Fulham forward George Williams on a season-long loan deal.
League Two side Colchester sign defender Lewis Kinsella on a two-year deal following his release by Aston Villa.
Oldham appoint former Motherwell boss Ian Baraclough as assistant manager on a two-year contract.
Sheffield United have turned down a second bid from Birmingham City for their young striker Che Adams, according to Sky sources.
Portsmouth complete the signing of goalkeeper David Forde on a season-long loan from Millwall.