Modular cross-platform multi-threaded FTP server which is in active development.
BSEditor: Features:
Simple configuration file, supporting inclusions
Online administration, using SITE commands
Backends to store users/groups in different structures
Modules: internal, using shared libraries, or external (scripts/applications), and protocols
Extension scripts can be written in Tcl or Perl
Powerful event system
Job scheduler, also known as crontab
Users are virtual: you do not need to Create users in system
Support for UTF-8: Unicode filenames
SSL/TLS support
IPv6 support (Experimental)
Designed to run as a non-privileged user to enforce security
Can Detect IP changes (dynamic IPs) and set IP and passive IP accordingly
Cross device operations (copy/move) (though this can be slow)
Logging support (compatible with the wu-ftpd standard)
Designed for high performances: coded with C, multithreaded
Portable: runs on Linux, BSD and Windows
Compliance with RFC standards
zeroconf support: the FTP service can be published on the network
Inbuilt cookies parser for FTP control messages and External Event triggers
On-the-fly CRC calculation for use with external zipscripts/sfvscripts
Virtual file system (VFS) support . you can free download wzdftpd 0.8.3 now.