NotFTP is a fully-featured and easy-to-use Web-based HTTP-FTP gateway written in PHP. It supports all common FTP functions and allows the administrator to set a maximum transfer size and a daily transfer quota for users. It is particularly well-suited for making FTP accessible to users behind an HTTP-only proxy.
FileZilla is a multi-platform FTP program. The suite includes an easy-to-use client, which is similar to other popular FTP programs like WS-FTP or Cute-FTP, and a Windows-only server. The client supports various flavors of FTP and SCP, including FTP over SSL/TLS (FTPS) and SSH File Transfer Protocol (SFTP). The client also features IPv6 support, support for resuming and transferring files larger than 4GB, a tabbed user interface, a powerful site manager and transfer queue, bookmarks, drag and drop support, configurable transfer speed limits, filename filters, directory comparison, a network configuration wizard, remote file editing, keep-alive, HTTP/1.1, SOCKS5, and FTP-Proxy support, logging to a file, synchronized directory browsing, and remote file search.
net2ftp is a Web-based FTP client, offering standard FTP client functionality using a browser. Users can also zip files, email them in attachments, edit code in their browser, or view code with syntax highlighting. Configuration options: restrict the access to one FTP server; ban IP addresses or FTP servers; set a daily consumption limit; and 3 kinds of logging. It works under PHP's Safe Mode. MySQL is optional (only required for logging and consumption tracking).
tnftpd is a port of the NetBSD FTP server to other systems. It offers many enhancements over the traditional BSD ftpd, including per-class configuration directives via ftpd.conf(5), RFC 2389 and draft-ietf-ftpext-mlst-11 support, IPv6, transfer rate throttling, and more. tnftpd was formerly known as lukemftpd, and earlier versions are present in Mac OS X 10.2 (as ftpd) and FreeBSD 5.0 (as lukemftpd).
wzdftpd is designed to be a small, efficient, and highly modular/configurable FTP server for various platforms including Linux and Windows. The server is RFC compliant, multi-threaded and can be configured entirely online using SITE commands. You can write your own extensions to the server in your choice of language, extending on existing MySQL, PostgreSQL, SQLite, Tcl, Perl, PAM, and SFV plugins. Features include IPv6, TLS/SSL, UTF8, ACLs, VFS, events, scripting, plugins, job scheduler, bandwidth limitations, credits/sections, group administration, and customizable logging.
gnu.hylafax implements the HylaFAX client network protocol in pure Java. With it, Java applications can access a HylaFAX server in various ways, such as queueing FAX jobs, checking server/job status, and retrieving FAX files. The gnu.hylafax distribution also includes gnu.inet.ftp, a pure Java implementation of FTP client protocol (RFC0959).