Gaelyk Groovy Toolkit for Google App Engine Java
Gaelyk allows you to deploy applications on Google App Engine Java, and to separate your views with Groovy templates and your actions in Groovlets. The Gaelyk JAR can be used in combination with Groovy 1.6 or 1.7 and with the latest Google App Engine (GAE) SDK.
This version upgrades to the latest versions of Groovy 1.7.2 and the GAE SDK 184.108.40.206. Programmatic routes can now depend on GAE service, and the method of injecting binding variables has been refactored.
The JAR can be downloaded from the Gaelyk website.