I have created a web interface for users to view Open Source Physics/Easy Java Simulations

Click [url=http://www.phy.ntnu.edu.tw/ntnujava/EjsDL/indexEJSdl2.php]EJS DL interface[/url]

You will find a tree view at the left. Click one of the link , and information about that simulation will be displayed.
Links for the EJS jar file and source file are available at the top.
Click [img]http://www.phy.ntnu.edu.tw/ntnujava/EjsDL/eye.gif[/img] to view that applet.

All the simulations are available for download (Click jar file to download, double click downloaded file to run the simulation). You will also find the EJS source files if you unzip the jar file.
The OSP Collection provides curriculum resources that engage students in physics, computation, and computer modeling. Computational physics and computer modeling provide students with new ways to understand, describe, explain, and predict physical phenomena.
Easy Java Simulations, also known as EJS, is an authoring tool written in Java that helps non-programmers create interactive simulations in Java, mainly for teaching or learning purposes. EJS has been created by Francisco Esquembre and is part of the Open Source Physics project.

PS. EJS is a tool  created by Francisco at university of Mucia in Spain. Check out http://www.um.es/fem/EjsWiki/  for more information about EJS