Skype for Slack - Move your slack discussions to a group skype call
VoiceText for Slack - Voice notes w/ transcription in Slack
Calls on Slack - Make voice calls in Slack
Penman - A voice-driven note taking app ๐ฃ๏ธ๐
Pingly - Your communication hub โ Email, text & voice in one app
Tetra - Tetra is a call recording and analyzing program that allows you to focus on the conversation while it takes notes and remembers shortcuts for you.