2. Cool REST API project at work with Jetty, Jersey, Guice (DI), and JAXB. A little mvn too of course.
3. Some C# and Groovy explorartion gists.
4. Implemented a Clock object in JS. It's a gist, but it's easy to throw into a fiddle.
The gists are here:https://gist.github.com/jesslilly