React: Maintained by Facebook, React also has its devotees. Ideal for building large apps with data that changes regularly, ReactJS is very efficient, creating its own DOM where the components live.
Meteor: While not as popular as Angular or React, MeteorJS is ideal for those looking to build real-time web applications as developers can work on the back-end and the client side relatively easily.
Node: Ideal for those seeking scalable and fast network applications, the popularity of Node.js has exploded over the past few years thanks to a range of benefits including fast data streaming and numerous very useful tools.
There are hundreds of other frameworks for designers and developers to consider as they weigh their options; solutions include Ember, Backbone, Vue, Aurelia and others are regularly featured within Website Magazine's Design and Development channel so make sure to subscribe to receive update on these offerings and more each week.