Skype for Slack - Move your slack discussions to a group skype call
Slack - A messaging app for teams who see through the Earth!
Aircall Now - Make voice calls inside Intercom Messenger 📞💬
Standuply - Run daily standup meetings and track your metrics in Slack
HandsFree 2 - Call and SMS in Mac using your Android phone via Bluetooth
Glide 3 - Lightning fast live video messaging