io.js vs Volt: What are the differences?
io.js and Volt can be categorized as "Frameworks (Full Stack)" tools.
"Compatible with NPM" is the primary reason why developers consider io.js over the competitors, whereas "Handlebars" was stated as the key factor in picking Volt.
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.