jminix is a simple embeddable restful JMX console. It is useful for when you don't want to use an external full-blown JMX console, but just want to have a simple JMX entry point into your new or existing apps. Embedding JMiniX in a Web app is done simply by declaring a servlet. Deployed as a servlet, it benefits from your Web application configuration such as filters or security constraints.
PIT is a fast bytecode based mutation testing system for Java that makes it possible to test the effectiveness of your unit tests. You can think of mutation testing as either as an automated test of your tests or as a much more in-depth form of code coverage. Unlike traditional line and branch coverage tools, PIT does not just confirm that your tests execute your code, it confirms that your tests are actually able to detect faults in it.
Cambridge is a template engine for generating HTML/XML markup in Java applications. It is highly extensible, high performance, and designed to be less cluttered. It prefers making use of the scopes of the existing HTML/XML tags in your template instead of wrapping your tags with some non-standard tags or scripting code. Cambridge templates are pure HTML/XML documents that you can edit on any tool or view directly on browsers without any issues. Cambridge can be used in standalone Java applications, with Servlets, and along with popular Web frameworks such as Spring Mvc, Struts, Play Framework, JAX-RS, and many others.