Calipso was built with the Node.js framework Express and the MongoDB object modeling tool Mongoose.

This is the first full fledged Node.js-based CMS we've seen, though Tim Caswell did build a blogging engine based on Node.js and Git called Wheat.

Calipso was created by London-based developer Clifton Cunningham. Cunningham has worked on several Node.js and Drupal project in the past.