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Jasmin is a Java Assembler Interface. It takes ASCII descriptions for Java classes, written in a simple assembler-like syntax and using the Java Virtual Machine instruction set. It converts them into binary Java class files suitable for loading into a JVM implementation.

The Jaxen project is a Java XPath Engine. jaxen is a universal object model walker, capable of evaluating XPath expressions across multiple models. Currently supported are dom4j and JDOM . Jaxen provides a single point for XPath expression evaluation, regardless of the target object model, whether its dom4j, JDOM, DOM, JavaBeans, or whatnot.

JDOM is a Java library for accessing and manipulating XML documents. It has a straightforward API, is a lightweight and fast, and is optimized for the Java programmer. It's an alternative to DOM and SAX, although it integrates well with both DOM and SAX.

This is a port of JUnit, a simple testing framework for Java developed by Erich Gamma and Kent Beck. Using JUnit you can build a test suite that will help you measure your progress, spot unintended side effects, and focus your development efforts.

Parrot 是一个虚拟机，旨在有效地编译和执行字节码的动态语言。 Parrot 目前拥有各种语言的不同程度的实现，包括 Tcl、Javascript、Ruby、Lua、 Scheme、PHP、Python、Perl 6、APL、和一个 .NET 字节码翻译器。

Gforth is a fast and portable implementation of the ANS Forth language. It works nicely with the Emacs editor, offers some nice features such as input completion and history and a powerful locals facility, and it even has a manual. Gforth employs traditional implementation techniques: its inner innerpreter is indirect or direct threaded.

A Python extension embedding SWI-Prolog PyProlog is a Python extension that permits direct access to an embedded PROLOG. The extension lends Python the efficient unification and backtracking of PROLOG, and allows a programmer to instrument Python classes with PROLOG code. Callbacks from PROLOG to Python are also supported.

REXX/imc is a Rexx interpreter for Unix. It supports all the standard instructions and built-in functions, plus a small number of extensions, and has a partial implementation of the SAA API allowing applications to call Rexx programs and to register addressing environments, Rexx functions, and exit handlers.

This package is an implementation of BATV (Bounce Address Tag Validation), a draft proposal for detecting and messages making fraudulent use of a sender address. The filter is written as a plugin to Sendmail or other filters using the milter API.

Gubby is a small program that continually shows where Procmail has placed new email. It runs both in commandline and in an ncurses environment with colors, and will update the overview in real time, while using very low resources. Users can launch a specified mailreader by selecting a folder and pressing enter.