1. Angular JS
Another open source JS Framework that is based upon MVVM (Model View View Model) pattern, Ember.JS has been an alternative to React and Angular in many cases. It has been especially popular among developers working on interactive frontend UI and/or single page applications. While Ember.JS too offers two-way data binding, its effectiveness lies in server-side DOM rendering. This has particularly helped developers to get across processes without breaking the web and putting the entire app under a single URL. Developers have been successfully combining Ember with Ruby for highly interactive web applications.
Licensed under MIT, Aurelia.io is another open source JS framework that offers fast and lightweight data binding. Aurelia.io reactive system is ranked more than DOM diffusing since it offers a blazing speed. Further, Aurelia.io is a preferred choice since it helps eliminate code splitting, laze loading bundles, modules and much more, thus reducing the size of the program.
JS Frameworks have always played a key role in development processes by minimizing complexities in design, maintenance, and code structuring. While there are other alternatives that can fit your project needs perfectly, these seven have been the most used since their launch.