Slack is our official instant messenger app. It is like Whatsapp only but with lot better features. Most importantly it gets connected to all our daily use apps like GMail, Google Drive, Google Calendar etc. as well as to our project management app Trello. We will have all our internal team discussions in Slack. Please join the communities as per your interest and willingness to contribute and download Slack & Trello for mobile n desktops.
Consolidated list of our slack communities is given below: