Application Architecture for Building User Interfaces
Handlebars provides the power necessary to let you build semantic templates effectively with no frustration. An extension to the Mustache templating language created by Chris Wanstrath.
Give your JS App some Backbone with Models, Views, Collections, and Events
MJML: the only framework that makes responsive-email easy
Jade - robust, elegant, feature rich template engine for nodejs
Ajax with less suck - (and node.js HTTP client to match)
Full Featured HTML Framework For Building iOS & Android Apps
LoopBack makes it easy to build modern applications that require complex integrations.
Marko template engine
JSON Editor Online
A web-based tool to view, edit and format JSON