Lincoln City have signed utility player Peter Bore, striker Jefferson Louis and winger Nialle Rodney, with Blackpool striker Louis Almond joining on loan.
Louis, 32, has played for more than 20 clubs and was most recently at Southern Premier front-runners Brackley Town.
Ex-Grimsby player Bore, 24, has spent this term at Blue Square Bet North side Harrogate Town while Rodney, 20, joins the Imps after his release by Bradford.
The trio have signed for the rest of the season, as has loanee Almond, 20.
He spent the first half of the campaign on loan at the Imps' Blue Square Bet Premier rivals Barrow and made 24 appearances for the Holker Street club before returning to Blackpool.
Lincoln full-back Paul Robson, who had previously been on non-contract terms at Sincil Bank, has signed a permanent deal to the end of the season, while on-loan defender Matthew Pearson has been recalled by his parent club Blackburn Rovers.