Zaval Light-Weight Visual Components Library (LwVCL) is a pure Java alternative to humble AWT-based GUI interfaces for a wide range of platforms, including J2SE, PersonalJava, and others. It can be used on wide range of PersonalJava compatible devices, including Sharp Zaurus, Compaq iPAQ, and top models of mobile phones with the same API, as it is used in J2SE applications.
Multixterm creates multiple xterms that can be driven together or separately. It can be used to login via SSH to multiple hosts and control them simultaneously, or for ad hoc things where you want to see the results as you type. Each xterm may also be driven separately. Multixterm is scriptable so that you can easily fire up, for example, a dozen xterms with a single command, tiled nicely on your screen. In addition to SSH, multixterm can drive rlogin, telnet, passwd, or any program that runs in an xterm.
SpeedDemon is an Open Source Java tool to accelerate your Internet downloads. It works by downloading different parts of a file simultaneously and then recombines them to a location you specify. It also allows you to resume disconnected downloads. If you specify mirror links, SpeedDemon will download the file such that the load on the servers are evenly distributed. It has been designed to support different protocols; support for any protocol can be developed by just implementing an Interface, packing it into a JAR file, and then copying the JAR file into a specific directory.