Windows
1uglyftp, AbsoluteFTP, AceFTP, AutoFTP, AutoFTP Premium, CedeFTP, Crystal FTP, CuteFTP, Download Assistant, FileLink 3000
AxyFTP
X-Windows FTP client designed for Linux workstations. Motif and GTK+ versions available. Still in alpha.
FTP Now
Multi-threaded Windows FTP client software. Allows resumption of broken downloads. By Network-Client.com.
FTPPro
Designed for ease of use by Internet Explorer users. Download an evaluation copy for free.
IglooFTP
FTP client for Linux using the GTK+ library. features drag and drop, URL clipboard monitoring, and remote directory caching.
k.Soft Custom FTP
Custom FTP software for ISPs, portals, and web hosts, with appropriate FTP sites built-in.
LapLink FTP
Offers transfer queue, scheduling of downloads, and drag-and-drop.
NcFTP
Command-line client for UNIX. Includes NcFTPPut and NcFTPGet, which support FTP for shell scripts. Source code is available.
NFTP
Text-mode FTP client for OS/2, Windows, Linux, FreeBSD, SPARC Solaris, and BeOS Intel. Offers keystroke shortcuts; quasi-GUI version available for OS/2.
Secure FTP
Package written in Java providing for secure FTP connections using SSL.
SendFile.NET
Subscription service providing access to a browser-based Java FTP client. Includes built-in streaming file compression, works with Beehive FTP forms.
Web2FTP
Web interface duplicating the functions of an FTP client, providing a way around proxies. Also supports server administration.