RxJS Alternatives

RxJS is described as '»The Reactive Extensions for JavaScript (RxJS) is a set of libraries for composing asynchronous and event-based programs using observable sequences and fluent query operators that many of you already know by Array#extras in JavaScript' and is an website in the education & reference category. There are three alternatives to RxJS, not only websites but also apps for JavaScript. The best alternative is bacon.js, which is both free and Open Source. Other great sites and apps similar to RxJS are EVT and Kefir.