Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
Galette - Galette is a membership management web application towards non profit organizations.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Bigtent - BigTent is a web-based organization and communication portal for groups.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.