Song and Amalfitano made it nine new arrivals at Upton Park this summer, with Sam Allardyce entrusted with bringing a more attacking brand of football to east London.
Former Arsenal midfielder Song arrives on loan from Barcelona, hoping to resurrect his career after a disappointing few years with the Catalan giants, while Amalfitano returns to the Premier League after impressing whilst on loan at West Brom last season.
“Alex Song is a massive player who comes with great experience in the Premier League,” Tomkins told West Ham’s official website.
“He has gone to Barcelona and trained with the best, so he is only going to help us, I should imagine. We’re all really looking forward to playing alongside him.
“We played against Morgan last season at West Brom and he caused us a few problems and actually set up their goal as well, so he’ll be an important player for us.
“It shows how much we’re trying to strengthen our squad at the minute.
“I’m looking forward to working with the signings we’ve brought in and seeing how they will add to the squad."
Tomkins also sent his best wishes to Mohamed Diame, who left the Hammers for Hull City in the transfer window.
“Mo did really well for us here and the fans really liked him, but he obviously wanted to move on,” Tomkins added.
“Everyone wishes him all the best."