Ring4 Meeting - Dead simple video conferencing - free, in browser
LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.
Fellow.app - A manager’s co-pilot for 1:1s, meetings, feedback & goals 🚀
TextBlast Bulk SMS - Send personalized mass messages easily
Everleagues - Everleagues is a cloud-based application that offers team communication, file sharing and storage, data tracking, and activities management.
Texted.io - Send text blasts to groups, receive individual replies