Stevenage have completed the signings of Calvin Zola and Dean Wells.
Powerful striker Zola was a free agent after leaving Scottish Premiership side Aberdeen.
The 29-year-old has plenty of Football League experience having also played for the likes of Crewe Alexandra and Tranmere Rovers.
Meanwhile, Braintree Town defender Dean Wells has also joined Boro for a fee of around £25,000.
The centre-half was in big demand after helping the Essex side to the brink of the play-offs in The Conference last season, and Stevenage beat off competition from several League Two clubs to complete a deal.
Wells has signed a one-year contract, with the option for a further year.
"Dean is starting his Football League career late in life, but he continually impressed our Head of Recruitment and Graham Westley during last season and he has the enthusiasm, desire and determination to win that we seek in our players," chairman Phil Wallace said.
"He wants his chance. Graham (Westley) led the cause to secure Dean and made it possible by his refusal to let the deal fall through, so he deserves great credit for that."