If you have a website, and need to upload file, you usually use FTP (secure or not) or some local web file manager. The web file managers are usually fairly lame, so I’ve been on the lookout for an AJAX based one for a while. The Relay Directory Manager is the first example of an AJAX based file manager that I have seen – you can find it here

Relay AJAX

It is still in beta, and the upload bar and buttons can go a bit wonky, but it’s not bad – in fact I find it very useful indeed. Best of it’s open-source :-)