Many programs and utilities are available, whether for free, at cost, or provided with your computer/operating system. You may wish to ask a fellow website owner for suggestions, or consult a search engine for suggestions.
As an example, FileZilla, a free FTP client for Windows, Mac, and Linux, can be downloaded here:
Another free FTP client for Mac and Windows is Cyberduck:
Please note that Superb does not officially support third party software and cannot assist with troubleshooting any issues specific to the software. If problems are encountered with using a free FTP client, staff at Superb will check to determine if there is a problem associated with the server with which FTP access is being attempted but will not be responsible for troubleshooting problems specificially related to the FTP client.