Skype for Slack - Move your slack discussions to a group skype call
OpenPhone - Simplest way to own a business phone number
Aircall Now - Make voice calls inside Intercom Messenger 📞💬
Yodel - Group photo and video sharing. Create stories with friends, join stories from around the world.
HandsFree 2 - Call and SMS in Mac using your Android phone via Bluetooth
Houseparty - Brining empathy to online communication.