MS Whiteboard
Microsoft Whiteboard is a freeform, digital canvas where people, content, and ideas come together. You can use Whiteboard for collaborating with your team to accomplish many activities — whether your team is in the same place or in multiple locations.
Planning to use this for your HBL? Why not give it a go! :)
Other alternatives to Microsoft Whiteboard: MS OneNote, Google Jamboard, Microsoft Edge
How to use Microsoft Whiteboard (Kevin Stratvert)
How to use Microsoft Whiteboard (Leila Gharani)