Barrow will be a competitive force in the forthcoming National League season, says owner Paul Casson.
Wrexham manager Gary Mills says he is unlikely to sign anymore players before the start of the 2015-16 season.
League One side Wigan Athletic sign Tranmere midfielder Max Power on a three-year contract.
Wigan have agreed the signing of midfielder Max Power from Tranmere.
Exeter have signed defender Troy Brown following his release by Cheltenham.
Exeter City sign centre-back Troy Brown after being released by recently-relegated Cheltenham Town.
Newly promoted Bromley will be Wrexham's first opponents of the National League season on Saturday, 8 August.
Tranmere Rovers start their first season outside the Football League in 95 years with a home game against Woking on Saturday, 8 August.