Aurora is a mod that opens a webserver from your minecraft world for information and documentation.
Default port is 48574. To access the web page, for singleplayer worlds and local servers it's http://localhost:48574/, but for dedicated servers it will be the IP of your server instead of localhost (e.g. http://latmod.com:48574/). You might need to do port forwarding for TCP 48574 in your router!
The mod itself only adds Online Players and World Info pages. You can use <embed> in your website, like forums, to display player list. If you want to make it more custom, you can use the json variant instead. This mod is more used as dependency.