Sails.js is described as 'Make it easy to build custom, enterprise-grade Node.js apps. It is designed to mimic the MVC pattern of frameworks like Ruby on Rails, but with support for the requirements of modern apps: data-driven APIs with scalable, service-oriented architecture' and is an app in the development category. There are more than 50 alternatives to Sails.js for a variety of platforms, including Mac, Windows, Linux, Web-based and Self-Hosted apps. The best Sails.js alternative is Django, which is both free and Open Source. Other great apps like Sails.js are Meteor, Express, ember.js and Backbone.js.