For users who prefer a graphical interface, Recuva offers a highly reliable free version. It features an intuitive step-by-step wizard, deep scanning for buried files, and a secure overwrite feature if you want to destroy files permanently. PhotoRec (Open-Source)

If you are looking for information on "WinUndelete," it is a long-standing data recovery utility designed to recover deleted files from FAT and NTFS file systems.