Vert.x vs Volt: What are the differences?
Vert.x: A tool-kit for building reactive applications on the JVM. It is event driven and non blocking application framework. This means your app can handle a lot of concurrency using a small number of kernel threads. It lets your app scale with minimal hardware; Volt: A ruby web framework where your ruby runs on both server and client. Volt is a ruby web framework where your ruby code runs on both the server and the client (via opal.) The DOM automatically update as the user interacts with the page. Page state can be stored in the URL, if the user hits a URL directly, the HTML will first be rendered on the server for faster load times and easier indexing by search engines.
Vert.x and Volt can be categorized as "Frameworks (Full Stack)" tools.
Volt is an open source tool with 3.3K GitHub stars and 209 GitHub forks. Here's a link to Volt's open source repository on GitHub.