NWL
Spoofax
The NWL Editor
Based on the WebDSL language, NWL is a pedagogical language definition created with Spoofax/IMP.
In addition to NWL, Spoofax/IMP also comes with a simple "entities" language that illustrates most concepts of the workbench. The "entities" language described in the Tour of Spoofax/IMP and included with the standard download package.
NWL can be downloaded from https://svn.strategoxt.org/repos/WebDSL/webdsls/branch/nwl. The definition can be used by simply loading the project into an Eclipse environment with Spoofax/IMP installed.