McSherry 

A comprehensive library for working with Semantic Versions (2.0.0), version ranges (node-semver v6.0.0), and Monotonic Versions (1.2).

Zener is an embeddable HTTP server with supporting logic. It handles loading resources and provides a set of APIs that allows your front-end code (such as JavaScript or Dart) to communicate with your back-end logic. Zener can simplify development and means you can use the same client↔server mindset... More information