Dropbox - Online Sync and File Sharing
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.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
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.