Slack

Slack is a cloud-based set of tools and services that makes it easy to get work done. It’s built for teams of all sizes, and has a simple, beautiful design that’s easy to use and works great on any device.

Twitter

Twitter is a social networking service that enables users to send and read short 140-character messages called “tweets”.

Instagram

Instagram is a photo-sharing, video-sharing and communication service that is owned and operated by Facebook, Inc. It was created by Kevin Systrom and Mike Krieger, and launched in October 2010.