Telnet & FTP Clients

[grtmoby]

FileZilla is an Open Source (GNU/GPL) FTP client for Windows, Mac OS X and GNU/Linux. nice powerful FTP client.

Putty is a Telnet client.

Both allow the communication with your receiver along with file transfer and setting file permissions.

[renwich]

Dont forget Winscp which is a powerfull SFTP/FTP client, and is freeware

[grtmoby]

As per request ;D

Winscp: Open source freeware SFTP, FTP and SCP client for Windows