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Java applets -

Small programs written in the Java programming language that can be embedded into web pages. Give examples. Applet programs run on the Internet user's computer rather than the web server's computer. Search engines can not run Java applets. Consequently, if navigation or content is embedded in a Java applet, it will be invisible to the search engines and will not get indexed.

Java Scripts -

Programs written in the JavaScript programming language. JavaScripts run on the Internet user's computer rather than the web server's computer. Search engines can not read JavaScripts. Consequently, if navigation or content is embedded in a JavaScript, it will be invisible to the search engines and will not get indexed.

Joomla -

Joomla is a PHP based open source content management system that is released under GNU GPL License.