"Relying on CVS and Subversion [...] with access controls limited to the select few committers makes it very difficult for those on the fringes to get more involved."
openArchitectureWare (oAW) is a modular MDA/MDD generator framework implemented in Java(TM). It supports parsing of arbitrary models, and a language family to check and transform models as well as generate code based on them. Supporting editors are based on the Eclipse platform. OAW has strong support for EMF (Eclipse Modelling Framework) based models but can work with other models, too (e.g. UML2, XML or simple JavaBeans) At the core there is a workflow engine allowing the definition of generator/transformation workflows. A number of prebuilt workflow components can be used for reading and instantiating models, checking them for constraint violations, transforming them into other models and then finally, for generating code.
the most effective learning situation is one where a small number of apprentices work alongside an even smaller number of journeyman, who are receiving guidance from a master craftsman
"Google can be considered a fusion of the startup and grad-school mentalities ... It's all been done before; the only thing that's really surprising is that Google has managed to make it scale."