JCabi is a collection of small, useful Java components. It includes a convenient static wrapper around SLF4J, a Sonatype Aether adapter, an Amazon Elastic Beanstalk Maven plugin for seamless deployment of artifacts, a Heroku Maven plugin, a Maven Log to SLF4J binding, and a few others.
MockMockWeb is a Heroku-ready Node.js-based Web application server which allows you to mock up a website in seconds. It allows you to instantly launch a website which sends an empty page (with status 200) to any request/URL and edit any page on the spot. You can also edit the layout shared throughout your website. It lets you build a mock (sometimes real) website in a request-driven interaction.