Installation procedure:
You computer need to have [url=http://www.java.com/en/download/manual.jsp]Java Run time[/url] installed.
[list]
[li]Unzip the [url=http://www.phy.ntnu.edu.tw/demolab/download/EjsLatest.zip]downloded file [/url]to any directory (for example: c:) It will create a subdirectory Ejs
[/li]
[li]Double click Ejs/EjsConsole.jar to run it![/li]
[/list]
And it is all free! ::)