JS4J is an extensible framework built on Java and XML that generates Javascript. It contains a built-in implementations to manage objects that have been generated by the framework, and can provide a scalable alternative to AJAX implementations.
"Fiber" is a java library which adds functionalities to the Sun java standard library : new Swing widgets ( preferences dialog, event log , ... ) , new supported protocols ( rss ) , frameworks ( user tracking on web applications ) and other utilities
DetectBrowser is Perl module which detects user's browser and OS, by analyzing the HTTP user-agent string. It recognizes all versions of AOL,Konqueror,MSIE,Mozilla,Netscape,Opera,WebTV,etc... running on BSD,HP-UX,Linux,Mac,Sun,Windows,etc...