Jaiwls is a component oriented framework with bundled a servlet Web server (Jetty) and HTML widget library. It is easy to integrate in existing applications with static compiled Java classes and supports dynamic websites using Groovy, a runtime injectable singelton instance, well formatted stack traces, a low memory footprint for compiled projects, powerful URL rewrites possible, a production mode (with no recompilation) for Groovy-based applications, and much more.
Simple Log is a small library that does logging very simply and requires you to do almost nothing (other than actually logging) to get log output to happen. It is much simpler to use than a logging framework, especially in terms of configuration. It doesn't attempt to solve every logging problem in one package, but contains enough features to be a viable alternative for most applications that need logging. This tool will handle the logging needs of most small- to large-sized projects, but with an almost non-existent learning curve.
visural-wicket is a useful set of light-weight, loosely coupled components and utilities for the Apache Wicket Web framework. Each component is designed to be easily integrated into any existing Wicket application with minimal dependencies. Each component is also designed to be easily customized to fit a particular system's requirements. Other than components, visural-wicket includes some other utilities that assist in the development of Wicket applications, such as an annotation-based mounting system, model templates, and an automatic "form view mode" component.