This is one of the best programmes ever to be released free of charge on the web. Open Source is truly one of the craziest ideas ever to come out of the internet! Filezilla is an FTP Transfer programme to get files from your computer onto your website.
This programme enables you to adjust just about everything in your website. Whether this is php files, html files, text files, images etc.. Download this software and the sky is your limit.
I reckon that if this had ever been released commercially, it would have cost in the region of about £750. We use it all the time for our websites and can recommend it to anyone else looking to manage their own web space. It does not take too much technical know how.