XMMS-web-control is a CGI script that lets you control your XMMS over the web. Ideal to be used on your home linux-based media-center that has no monitor and you don't want to be bothered to VNC or connect remotely via X. XMMS-web-control also has a plugin version that has a built-in webserver but it is a bit buggy and due to the fact that XMMS is obsolete now those bugs will not be cleaned. Nevertheless I suspect that I'll start working on a XMMS2 plugin in order to create for myself a linux-based media-center based on my 5-years old PC.
XMMS-web-control's official website is at http://rousse.pm.org/~georgi/xmms/. You can download both the CGI and the C plugin version from that website.