Northampton Town sign Burnley defender Clarke Carlisle on loan and Ben Harding from Wycombe on a free transfer.
Torquay United manager Martin Ling is confident that he has enough cover in defence after the sale of Chris Robertson to Preston North End.
Matt Ritchie gets among the scorers as Swindon thrash Southend and leapfrog their League Two rivals into second place.
Oxford United complete the double signing of Wycombe Wanderers' Scott Rendell and Doncaster's Mark Wilson.
Swindon Town sign Inverness Caledonian Thistle midfielder Lee Cox on a two-and-a-half year deal.
Exeter City sign Bradford City full-back Luke O'Brien for an undisclosed fee.
Plymouth Argyle sign strikers Juvhel Tsoumou and Alex MacDonald on loan deals.
Preston North End sign Torquay United centre-back Chris Robertson for an undisclosed fee and Cork City's Graham Cummins.
Crawley Town sign Blackpool striker Billy Clarke for an undisclosed fee.
Crewe Alexandra captain Dave Artell admits he and Adam Dugdale let the team down after they were sent-off at Barnet.