Thanks for putting together this awesome list!
For the first time Yodel.io has a Black Friday offer that would fit right into that list.
Change the way you collaborate on phone calls with adding a phone number to your Slack! Share calls within seconds to any team member in any location. Easy to monitor and scalable for your business! Here is the link: https://www.yodel.io/bfcm.html?ref=blogbbfd
Get Yodel for USD 12,- (50% off) for the first 3 months. 14 day trial and cancel anytime.