Unfortunately, it is all EJS based applets. I can run EJS jars from Compadre's OSP site without problems. Here is the error from the tigernmirror:
[code]
[color=blue][tt]basic: Added progress listener: sun.plugin.util.GrayBoxPainter$GrayBoxProgressListener@113c652
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/org/opensourcephysics/ejs/LauncherApplet.class with proxy=DIRECT
network: Connecting http://www.phy.ntnu.edu.tw:80/ with proxy=DIRECT
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/org/opensourcephysics/ejs/LauncherApplet.class with cookie "FKHCookie=a%3A4%3A%7Bi%3A0%3Bs%3A5%3A%2229266%22%3Bi%3A1%3Bs%3A40%3A%22a25f61d2471802083c20a6fb1e81378d3705ba61%22%3Bi%3A2%3Bi%3A1422277432%3Bi%3A3%3Bi%3A1%3B%7D; smfucount=9; ID_MEMBER=29266; PHPSESSID=d0b39196025e1941f8405d9aa5c02f7d"
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/org/opensourcephysics/ejs/LauncherApplet.class with proxy=DIRECT
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/org/opensourcephysics/ejs/LauncherApplet.class with cookie "FKHCookie=a%3A4%3A%7Bi%3A0%3Bs%3A5%3A%2229266%22%3Bi%3A1%3Bs%3A40%3A%22a25f61d2471802083c20a6fb1e81378d3705ba61%22%3Bi%3A2%3Bi%3A1422277432%3Bi%3A3%3Bi%3A1%3B%7D; smfucount=9; ID_MEMBER=29266; PHPSESSID=d0b39196025e1941f8405d9aa5c02f7d"
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/tigerNmirror/tigerNmirrorApplet.class with proxy=DIRECT
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/tigerNmirror/tigerNmirrorApplet.class with cookie "FKHCookie=a%3A4%3A%7Bi%3A0%3Bs%3A5%3A%2229266%22%3Bi%3A1%3Bs%3A40%3A%22a25f61d2471802083c20a6fb1e81378d3705ba61%22%3Bi%3A2%3Bi%3A1422277432%3Bi%3A3%3Bi%3A1%3B%7D; smfucount=9; ID_MEMBER=29266; PHPSESSID=d0b39196025e1941f8405d9aa5c02f7d"
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/tigerNmirror/tigerNmirrorApplet/class.class with proxy=DIRECT
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/tigerNmirror/tigerNmirrorApplet/class.class with cookie "FKHCookie=a%3A4%3A%7Bi%3A0%3Bs%3A5%3A%2229266%22%3Bi%3A1%3Bs%3A40%3A%22a25f61d2471802083c20a6fb1e81378d3705ba61%22%3Bi%3A2%3Bi%3A1422277432%3Bi%3A3%3Bi%3A1%3B%7D; smfucount=9; ID_MEMBER=29266; PHPSESSID=d0b39196025e1941f8405d9aa5c02f7d"
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/tigerNmirror/tigerNmirrorApplet/class.class with proxy=DIRECT
network: Connecting http://www.phy.ntnu.edu.tw/ntnujava/ejs/tigerNmirror/tigerNmirrorApplet/class.class with cookie "FKHCookie=a%3A4%3A%7Bi%3A0%3Bs%3A5%3A%2229266%22%3Bi%3A1%3Bs%3A40%3A%22a25f61d2471802083c20a6fb1e81378d3705ba61%22%3Bi%3A2%3Bi%3A1422277432%3Bi%3A3%3Bi%3A1%3B%7D; smfucount=9; ID_MEMBER=29266; PHPSESSID=d0b39196025e1941f8405d9aa5c02f7d"
basic: load: class tigerNmirror.tigerNmirrorApplet.class not found.
load: class tigerNmirror.tigerNmirrorApplet.class not found.
java.lang.ClassNotFoundException: tigerNmirror.tigerNmirrorApplet.class
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed:http://www.phy.ntnu.edu.tw/ntnujava/ejs/tigerNmirror/tigerNmirrorApplet/class.class
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 7 more
Exception: java.lang.ClassNotFoundException: tigerNmirror.tigerNmirrorApplet.class
Ignored exception: java.lang.ClassNotFoundException: tigerNmirror.tigerNmirrorApplet.class[/tt][/color]

Here is the URL: http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=218.0

With another mirror applet, I unpacked the jars and placed them all at the same level as the html. Changed the reference to the jars accordingly. [color=red][u][b]The weird thing is that the ejsBasic jar comes empty (no files in the jar).[/b][/u][/color]
I then get this error:
[color=blue]basic: Added progress listener: sun.plugin.util.GrayBoxPainter$GrayBoxProgressListener@4694ef
basic: error: org/opensourcephysics/ejs/LauncherApplet.
java.lang.NoClassDefFoundError: org/opensourcephysics/ejs/LauncherApplet
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.opensourcephysics.ejs.LauncherApplet
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 10 more
Caused by: java.io.FileNotFoundException: C:\Users\Public\Documents\tigerNmirror\org\opensourcephysics\ejs\LauncherApplet.class (The system cannot find the path specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.(Unknown Source)
at java.io.FileInputStream.(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 14 more
Exception: java.lang.NoClassDefFoundError: org/opensourcephysics/ejs/LauncherApplet
Ignored exception: java.lang.NoClassDefFoundError: org/opensourcephysics/ejs/LauncherApplet
basic: Loading Java Applet Failed...[/color]
[/code]
Thanks for your help and for all the neat physics you have here.

Here is the URL: http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=218.0

TM