Grimsby Town have signed Wales midfielder George Williams and former Notts County forward Montel Gibson.
Former Fulham man Williams, 24, arrives on a two-year deal as a free agent following his release by fellow League Two outfit Forest Green Rovers.
Gibson, 22, spent last season with non-league club Halesowen Town, scoring 31 times in 46 appearances.
The striker has agreed a three-year contract with Ian Holloway's fourth-tier side.
"We've had it before where players come in from the lower leagues, prove what they can do and then go onto better things," Holloway said regarding Gibson.
"I have taken players from the lower leagues and they've gone on to shine bright."
Williams has seven senior Wales caps and has also previously played for clubs including Fulham, Gillingham and his sometime side Milton Keynes Dons.
He said: "I got a phone call from the manager recently, he outlined the project that he's got going on here and asked if I wanted to be part of it.
"It was an easy decision after talking to him to come up here, I have trained a couple of days with the boys and I am fully on board with the project we have here."
Gibson added: "At first, I thought I was going to wake up and it just be a dream, but he's [Holloway] a good man, he's going to put time and effort into each and every one of us, get the best out of us and I will always give him and the club 100%."