Slack - A messaging app for teams who see through the Earth!
ReviewFlowz - Never miss a review again All your reviews, straight to your favourite slack channel.
9mCollab - Collaborate (efficiently) Conclude (fast) Contribute (in the knowledge base)
App in Review - Find out where your app is in the review queue
Mattermost - Mattermost is an open source alternative to Slack.
Reviews for iOS - Keep track of your App Store reviews