Blackpool have signed Adda Djeziri, Alberto Noguera and James Caton on free transfers and also hope to bring in Swansea forward Stephen Dobbie.
Ian Holloway has recruited Algerian striker Djeziri, 24, for a second time, having
taken him to Leicester in 2007,
and he has signed a one-year deal.
Spanish midfielder Noguera, 22, and ex-Bolton winger Caton, 18, have signed two-year contracts.
The trio had all been on trial with the Championship club.
Blackpool have the option to extend the deals by a year, while Dobbie could become their fourth recruit this month.
Dobbie ended last season on loan with Blackpool
Swansea deny the clubs have agreed a fee, although
BBC Radio Lancashire
reports a bid has been accepted.
Dobbie scored six times in 10 games for Ian Holloway's side during a loan spell last season and featured in their play-off final defeat by West Ham in May.
keen to take the Scottish striker back to Bloomfield Road
after two loan spells with the Seasiders.
Speaking during pre-season, Dobbie said he hoped to force his way back into contention for a starting place at the Liberty Stadium under new boss Michael Laudrup, having
fallen out of favour with his predecessor Brendan Rodgers.
lost 2-1 to League Two side Morecambe
in the first round of the Capital One Cup on Sunday, begin the new Championship season away at Millwall.