Windows DDE API for Java
- DDE for Java library allows Java applications to communicate with native applications on Windows platform via Dynamic Data Exchange (DDE) protocol. [Commercial]
- http://www.javaparts.com/

jRAS32
- A Dial-Up Networking (DUN) or Remote Access Service (RAS) Java interface for Windows operating systems. [Open Source, LGPL]
- http://jras32.sourceforge.net/

Java Native Interface to Microsoft Windows Registry
- Make easy access to Microsoft Windows registry from JVM. [Freeware]
- http://jrgwin32.narod.ru/

Windows Tray Icon for Java
- A library to add System Tray or Shell Notification Area support to any Java application. It supports Popup menus and Unicode. [Freeware]
- http://jeans.studentenweb.org/java/trayicon/

JTray
- A Java System Tray API for Windows. [Commercial, trial version]
- http://www.javaapis.com/jtray/

JDUN
- A dial-up networking (DUN) Java interface for Windows operating systems. [Commercial, trial version]
- http://www.javaapis.com/jdun/

Softhema Group
- JPA-API (Java Process Automation API) - executing and remote controlling of external applications, access to user interfaces through Java. JTC-API (Java Toolkit Collection API) Class library with useful extensions for file access, text processing, string
- http://www.softhema.de/

com.neva.Coroutine class
- Provides the mechanism for Java classes to call external functions located in Win32 DLLs without having to build wrappers that utilize one of the Java-To-Native interfaces. [Shareware]
- http://www.nevaobject.com/_docs/_coroutine/coroutine.htm

Java bean for Crystal Reports
- Interface to control Crystal Reports by java applications.
- http://www.must.de/Jareport.htm

JNIRegistry
- Java native interface for the Windows Registry API. Allows Java programs to access, modify, and export Windows Registry resources. [Open Source, GPL]
- http://www.trustice.com/java/jnireg/

Java Bean Word Processing
- A Windows interface to allow Java applications to control Word for Windows. Simple operations such as typing text, creating, saving and printing documents, and calling macros, are supported. [Freeware]
- http://www.java400.de/Javactpe.htm