Dropwizard is a sneaky way of making fast Java or Scala web services.

It's a little bit of opinionated glue code which bangs together a set of libraries which have historically not sucked:

• Jetty for HTTP servin'.
• Jersey for REST modelin'.
• Jackson for JSON parsin' and generatin'.
• Logback for loggin'.
• Hibernate Validator for validatin'.
• Metrics for figurin' out what your service is doin' in production.
• SnakeYAML for YAML parsin' and configuratin'.

Yammer's high-performance, low-latency, Java and Scala services all use Dropwizard. In fact, Dropwizard is really just a simple extraction of Yammer's glue code.

Read more at dropwizard.codahale.com.