Teams - Customizable chat-based workspace

OneDrive - Store, access, and share files

Forms - Create surveys, quizzes, and polls and see the results in real time

Sharepoint - Share and manage content, knowledge, and applications

Stream - Share videos of classes, meetings, presentations, and training sessions

Sway - Create and share interactive reports, and presentations

Yammer - Connect with others, share information, and organize projects

Whiteboard - Collaborate on a freeform canvas designed for pen, touch and keyboard input

Full list of Office 365 Apps