BetaONE will rise again! - Ftp Server Software For Unix/linux?

I can suggest
vsftpd (Very Secure FTP Deamon)

Quote:

Features

Despite being small for purposes of speed and security, many more complicated FTP setups are achievable with vsftpd! By no means an exclusive list, vsftpd will handle:

    * Virtual IP configurations.
    * Virtual users.
    * Standalone or inetd operation.
    * Powerful per-user configurability.
    * Bandwidth throttling.
    * Per-source-IP configurability.
    * Per-source-IP limits.
    * IPv6
    * etc...

more info @: vsftpd.beasts.org/

anoter hint is PROftpd @ www.proftpd.org/