Apache Byte Code Engineering Library (formerly known as JavaClass) is intended to give users a convenient utility to analyze, create, and manipulate (binary) Java class. Classes are represented by objects which contain all the symbolic information of the given class, in particular the methods, fields and byte code instructions. Such objects can be read from an existing file, be transformed by a program (e.g. a class loader at run-time), and can be dumped to a file. One interesting application is the creation of classes from scratch at run-time. Apache Byte Code Engineering Library (BCEL) may be also useful if you want to learn about the Java Virtual Machine (JVM) and the format of Java .class files.
SecurityFilter is intended for use by Java Web application developers. It provides robust security and automatic authentication services for Web applications using FORM or BASIC authentication. It generally mimics the behavior and configuration format of container-managed security, but has some useful functional and portability advantages.
mod_pointer is an Apache module for making domain redirects easy. The configuration part of the mappings are handled in either a MySQL or Postgresql database, or in a NDBM or SDBM db file, which makes it it easy to build a web-based interface for letting users change it on their own.
AxKit is a mod_perl-based XML Application Server for Apache. Employing a rich set of standards-compliant techniques as well as extensible scripting options, AxKit provides on-the-fly conversion from XML to a variety of other formats including HTML, WAP, and plain text. AxKit's notable technical features include the introduction of XPathScript, a powerful, Perl-based transformation language, built-in support for XSLT, "smart" caching, and the easy creation of dynamic XML documents.
ePortal is an integration of Expresso, Struts and Tiles with an implementation of the Java Portlet Specfication (JSR 168). With this integration the community software including eForum and eContent (a Web content management solution) and other Jcorporate components including ePoll, eFAQ, and eHelpdesk are available in a portal.