Crawley boss John Gregory has dumped five players on the transfer list including captain Josh Simpson.
Bury have completed the signing of winger Lewis Young on a deal until the end of the season.
Northampton manager Gary Johnson has further reinforced his squad with three new signings.
Burton have snapped up trialists Jack Dyer, Lewis Young and Garyn Preen on one-year deals.
Millwall's Adam Bolder is training with Burton as Paul Peschisolido considers signing two other trialists.
Burton boss Paul Peschisolido admitted he was impressed by the contribution of trialist Lewis Young.
Hereford United have signed Watford's promising striker Lewis Young on an initial month-long loan deal.
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