A FTP client is a basic necessity for the any developer.
FTP clients allow you to transfer data from the hard drive to the web hosting server.

A good client could easily update data, create mirrored sites and even help make quick changes at the host.

Filezilla

Filezilla is one popular FTP client that runs on the Win9x/ME/NT4/2000/XP.

This free software is fast to connect, has the ability to modify file attributes, resume downloads and do custom commands.

Some of the features of Filezilla are firewall support, SOCKS 4/5, HTTP 1.1 proxy support, SSL secured connections, SFTP support, Upload/Download Queue, Multi-language support, GSS authentication and encryption using Kerberos. It gives various options like secure mode /non-secure mode or Standard/ Full/Custom to choose from during installation itself.

Resources
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SmartFTP

SmartFTP is a FTP client for Windows, developed by SmartSoft Ltd. Features include SSL/TLS, IPv6 and FXP support, a backup tool, a transfer queue, proxy and firewall support, multiple connections, chmod features, Drag-and-drop and localization for over 20 languages.

Resources
Website | Download

CuteFTP

CuteFTP is one of the best and easiest FTP clients for beginners. The remote file editing feature in it is a real boon to developers who need to make quick changes and fixes.

The developer could easily drag and drop data from the Windows interface directly to the site and the FTP wizard helps to create an FTP location. The interface is very straightforward and thus perfect for beginners.

The CuteFTP client lacks features like secure transfer or site mirroring.

Resources
Website | Download

FTP Voyager 9.0

FTP voyager is one of the most flexible and easy to use FTP clients.
It is the most invaluable client for advanced users with multiple sites.
It offers almost all the basic and valuable features like firewall support and upload resume.

A developer could easily drag and drop data between Windows and FTP site.

Favorite sites could be stored in the drop down button option and allows easy handling and access. It enables the user to transfer data from two remote servers without transferring data to the desktop and resumes broken upload/download activity without prompting.

FTP Voyager supports secure FTP using SSL and uses the synchronization feature to mirror directories or web sites.

Resources
Website | Download

WS_FTP Pro

The WS_FTP is one of the best and professional FTP clients for beginners who are familiar with Windows interface, thanks to the ease of use and Windows integration.

It has WS_FTP command line with scripts to automate transfers and resumes a broken download or upload from any link. Files can be easily dragged into the site and there is an audio cue service which updates status of transfers.

Resources
Website | Download