AntInstaller
AntInstaller is an installer framework which uses a simple XML file to define the UI, and Apache Ant as a back end. The installers can therefore do anything Ant can, and are compatible with Ant's extension mechanism. Installers can be packaged as a selfextracting Jar and can run from the command line or a Swing GUI. AntInstall can also be used as a GUI front end for existing Ant builds.

FiJI
FiJI is a Free Java Installer released under GPL. It enables you to distribute your applications with easy installation : the user doesn't have to edit lauching scripts (to modify a CLASSPATH for instance).

FreeInstaller
FreeInstaller is an Open Source installer program written in Java. It has a self extracting class file, is able to install Java and non-Java software on UNIX, LINUX and Windows NT.

IzPack
IzPack is an installers generator for the Java platform. It produces lightweight installers that can be run on any operating system where a Java virtual machine is available. Depending on the operating system, it can be launched by a double-click or a simple 'java -jar installer.jar' on a shell. The most common use is to distribute applications for the Java platform, but you can also use it for other kinds of projects. The main benefit of IzPack is that it provides a clean and unique way of distributing a project to users using different operating systems.

JSmooth
JSmooth is a Java Executable Wrapper that makes a standard Windows executable binary (.exe) from a jar file. It makes java deployment much smoother and user-friendly, as it is able to find a Java VM by itself. When no VM is available, it provides feed-back to the users, and can launch the default web browser to an URL that explains how to download a Java VM.

Launch4J
Windows native executable java application wrapper.

Lift Off Java Installer
Lift Off Java Installer is an installer for Java applications. Highlights are self-extracting class files, minimal requirements for the Java installation on the target system, and cross platform installation.

Mini Installer
A simple package to build self installating programs in Java. The process is script driven, the result is a unique JAR file that the user can double click to execute a wizard-like installation process.

Packlet
Packlet is a simple installer tool for Java. A packlet is similar to a zip or tgz file: it packages an application into a single compressed file that can be distributed. Packlet files are Java class files that can be executed on any machine with Java 2 Runtime Environment installed.

Toolshed
A small, simple, pure-Java installer.