A simple– if perhaps slightly pedantic– node app for generating heady metaphors. See it in action at metaphorpsum.com.
The sentence templating engine that powers Metaphorpsum has become a node module called Sentencer. Metaphorpsum itself has been refactored to use streams.
Metaphorpsum is MIT licensed: free as in beer. Use it as boilerplate, or just as inspiration, for your own random sentence generating!