Pure-FTPd is a free (BSD), secure, production-quality and standard-conformant
FTP server based upon Troll-FTPd.  It doesn't provide useless bells and
whistles, but focuses on efficiency and ease of use.  It provides simple
answers to common needs, plus unique useful features for personal users as
well as hosting providers.

Homepage:
https://www.pureftpd.org/project/pure-ftpd
