Collabe is a Team communication tool for modern teams loaded with all essentials features such as direct messaging, group messaging, file sharing, favourites & mentions, Notes. All at cost of ZERO dollar.
@vinodkashyap Slack is another communication tool available in market.
Although slack and Collabe have all together different work flows, different navigation. You can give it a try.
Placr
works good
Pros:looks good
Cons:didn't encounter any
Collabe
Collabe