Cameroon keeper Joslain Mayebi, Greek midfielder Ilias Kyriakidis and Benin striker Razak Omotoyossi have all joined Leicester on a trial basis. Mayebi, who has been called into the senior Cameroon squad but remains uncapped, has previously spent time on trial with Preston.
Kyriakidis is a free agent after leaving Larissa, following a three-year stint with the club.
Benin international Omotoyossi cancelled his contract with FC Metz prior to the transfer window closing in August.
He has since attempted to win deals with Blackpool and Swansea, but neither have been successful - but he is hoping he will have more luck with Leicester.
"Generally we are just looking at players at the moment," said Derek Fazackerley.
"Players get offered to us and, while we have the opportunity with good weather and good training conditions, it would be wrong not to have a look at them."