From Google Drawings Chrome application: "Create shapes and diagrams
Add some color to your documents, presentations, and websites with easy to create charts and diagrams.

Get it done together
Build charts, layout diagrams, create flow charts, and then easily add them to other documents or embed them on a website.

Care to comment?
Comment on a shape or text box to give context to your discussion. Send an email notification by adding someone to a comment.

Access anywhere, anytime
All your drawings are automatically saved and stored in Google Drive. Access them wherever you go, from any device."

Used by Erin Avram for her Cleveland Teaching Collaborative "Design Your Own Escape Room" presentation.