I like Scrapbox's Drawing tool. It is like a scrap box but digital. I like you can add your scribbles and is readily downloadable and shareable. I also like how they make the notes like cards for easing glancing, looks almost like trello. You can create separate projects for each of your notes, and you can organize them the way you want it. You can even change the color theme, and each project has its own URL, which is nice for showing it privately. Or you can simply switch your project board to public, so everyone can see.

Scrapbox a new style of team noting. It takes collaboration to a whole different level