Community

• Rxteam blog on MSDN
• #reactivex on IRC
• JabbR rx

RxJava

• StackOverflow rx-java
• Google Group RxJava
• Twitter @RxJava
• GitHub Issues
• Gitter RxJava room
• Speakerdeck

RxJS

• StackOverflow rxjs
• Google Group RxJS
• Gitter RxJS room

RxSwift

• StackOverflow rx-swift
• RxSwift Slack
• RxSwift Community Projects
• RxSwift Community @ GitHub

Rx.NET

• Discussion forum on Codeplex
• Gitter Rx.NET room

RxCpp

• Discussion forum on Codeplex

RxPy

• Discussion forum on Codeplex