I'm a product manager but work with developers all day. For what it's worth, we've been using our own tool: sharetheboard.com It allows you to combine the offl

I'm a product manager but work with developers all day. For what it's worth, we've been using our own tool: sharetheboard.com It allows you to combine the offline with the online, by digitizing handwritten content in real time. Works well as an extension of digital/virtual tools too.