Shocase - Social community for marketing professionals
Skype for Slack - Move your slack discussions to a group skype call
Stonly - Create interactive step-by-step guides
Calls on Slack - Make voice calls in Slack
Eyetem - Eyetem incentivizes neighbors to share location-based information in order to improve their communities, while also protecting their privacy.
Pingly - Your communication hub — Email, text & voice in one app