Apps similar to Lean include Meteor, which is free and open source. Other options are FeathersJS, Polymer, Remult and Aurelia. In total there are five JavaScript Frameworks like Lean for Mac, Windows, Linux, the web and self-hosting.
Meteor is a set of new technologies for building top-quality web apps in a fraction of the time. It is built around Smart Packages: little bundles of code that can run on a client, inside a cloud service, or both, and that can manage their lifetime inside the modern distributed...
Feathers is a real-time, micro-service web framework for NodeJS that gives you control over your data via RESTful resources, sockets and flexible plug-ins.
Polymer is a library that uses the latest web technologies to let you create custom HTML elements. Build anything from a button to a complete application as an encapsulated, reusable element that works across desktop and mobile.
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Aurelia is a JavaScript client framework that leverages simple conventions to empower your creativity.
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