Scribblar - Scribblar is a free online collaboration tool that is perfect for online tutoring.
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.
NoteBookCast - A real time shared whiteboard in your browser, teach, explain, sketch. For work, study, fun.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
OpenBoard - The OpenBoard software is an interactive white board software.
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.