For example, this one: http://www.moserware.com/2008/04/towards-moores-law-software...
Or Nanopass itself, not just as a tool for building DSLs, but as an example of a nice and clean DSL (of course, if it could bootstrap itself it would have been even better):
https://github.com/akeep/nanopass-framework
Or everything you can find in my github repositories (username: combinatorylogic).