ProFTPD is a scalable high-performance FTP server, its main attributes are its security and ease of configuration.
The style of configuration is similar to the Apache, and is highly configurable, including support for multiple virtual FTP servers, anonymous FTP, visibility of directory permissions-based...
The best: Personally it is without doubt the best ftp server for linux that I've tested, highly configurable and simple enough. It has many possibilities as a ratio, connection to database etc... Very good.