Conversation –> Old school, in good and bad senses (also video option)
Talking/speech –> Also old school (also video)
Slides –> Was Nokia’s? Link. This one is pretty visual, but has a reputation that it’s all Tufte-junk
Text/prose/vertical/memo –> Amazon’s internal method
Email –> Most companies use this a lot
IM/chat
Forum/long-form written discussion –> Knotable
Spreadsheet? Code?