jbootstrap is a tool that bootstraps your Java application without complex CLASSPATH settings. As long as your JAR dependencies are under one directory, jbootstrap will pick up the JARs, create an appropriate classloader, and fire up your application without requiring CLASSPATH adjustments.
Poor Man's Imaging Wrapper a clean and simple API wrapper over JAI, Java2D, ImageIO, and AWT. It supports a set of imaging operations (read, write, scale/resize, crop, grayscale, add transparency, rotate, add border, flip/mirror, add text, overlay, blur, sharpen, etc.) with simple direct calls to the API. If you want to switch from Java2D to JAI, all you need to do is add JAI jars to the classpath. It supports GIF encoding if PJA tools jars are available in the classpath.
SerfJ provides a very easy way of developing Java REST Web applications. It helps you to develop your application over an elegant MVC architecture, giving more importance to convention than configuration. This means, for example, you will not need configuration files or annotations in order to specify which view serves a controller's method. However, SerfJ is very flexible, so if you want to jump over those conventions, you can configure the behavior of your applications as you like. The framework tries to meet the JSR 311 specification, but it doesn't follow every point of the specification, because the purpose is to have a very intuitive library, and some some aspects of the specification are out of the scope of SerfJ.
action4Java is a lightweight, modular, extendible, and recursive Java component framework. It contains some standardized actions and a data container. These actions are called when a comment tag is found. The action is controlled by the attributes within. Actions can have any purpose. Templating is just an action by itself. The template controls loading of data and storing to a file by itself, and runs independently from a Java development environment. It includes simple examples demonstrating looping within a page or creating several pages based on the data of a simple Excel sheet, and more.