A list of libraries that aid reactive development on Android

As RxJava is gaining popularity among Android developers, I felt like compiling a list from libraries that offer a reactive API:

https://github.com/zsoltk/RxAndroidLibs

Learning RxJava / RxAndroid

If you only heard about it, but didn't know where to start, you'll find these links useful:

1. NotRxJava guide for lazy folks
   Yaroslav Heriatovych explores step by step how going async will first lead you to a callback hell, and how by applying the rx approach you can get back to a clean solution without losing your sanity. Also: cats!
2. The introduction to Reactive Programming you've been missing
   Reading this article from André Staltz just might flip the switch to have that "Aha!" moment you've been waiting for. Even though the sample code is for JS, you will find it useful for your RxJava adventures. Try to implement the same project in Android as a great exercise!
3. Grokking RxJava, Part 1: The Basics
   A great four part step by step tutorial by Dan Lew (see also part 2, part 3, part 4). Also make sure you watch this video by him: Reactive Extensions: Beyond the Basics

Update: Some more links:

1. RxMarbles
   An absolutely great, interactive site to learn about rx operators the visual way
2. Party tricks with RxJava, RxAndroid & Retrolambda:
   There are some really useful code snippets to get you started in no time

Also check out A list of libraries that aid reactive development on Android .