FitNesse Launcher Maven Plugin can launch FitNesse as a wiki server or automatically run FitNesse tests as part of a standard integration-test/verify build. It allows configuration of FitNesse's classpath through plugin dependencies and injects all Maven project properties as FitNesse variables (which can be overridden from the commandline using "-D").
Fulworx is a REST framework that uses simple annotations of XWork "Action" implementations to expose restful interfaces. Similar to Struts, Fulworx sits as a controller on top of Restlet. Each action is attached as a resource using Restlets. Standard resources are represented by default as XML (or JSON) using JAXB, but any representation may be specified. Actions may be used in other frameworks such as Struts and Webwork, since they're just XWork implementations.
The Geomajas API project contains some annotations that can be used to indicate which parts (which classes and which (public) methods or fields) are considered as the API. This is particularly useful for projects where you want to mark the API without the need to refactor everything to interfaces and factories.
Geomajas profiling project is a simple application profiling system that can be used to continuously gather profiling information in a running application. It allows you to get the number of invocations and total/average time. Profiling data can also be grouped to allow total time to be split up over different groups. There is utility code to use this for JDBC access profiling, and JMX integration for accessing the data which is gathered and reset the counters.
HTMLSplicer is a toolkit that provides methods to compose complex HTML documents from simpler HTML documents, called templates. It can be used to generate servlet responses in Java Web applications, without adopting a full-fledged presentation layer framework like JSP, JSF, Apache Wicket, or GWT.