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There is no standard for this. It depends on demand, team, investment, target users, etc. .

Tell me about me, and you will understand me:

// First answer on January 13, 2015
Client: Angular, Bootstrap
Server: Nodejs, AWS Elastic Beanstalk, Docker, Nginx
Storage: Zookeeper, Redis, MongoDB, AWS S3
Messaging: Kafka

//Updated on April 26, 2016
Client: React, Bootstrap/Foundation/Purecss
Packaging tool: Babel, Webpack
Server: Nodejs, Leancloud, Docker, Nginx
Storage: Zookeeper, Redis, MongoDB, Leancloud, Parse -server
Messaging: Kafka