I am looking for something that allows two or more people to collaborate on ideas. Ideally, something that doesn't require a signup. Something where you can easily share a link with new people. I am not looking for a full kitchen sink, just basic drawing features. Maybe with some pre-defined shapes like a box, circle, and triangles. Thanks!
- RealtimeBoard 2.0 can also be a good fit: simple as Sketch, but collaborative as Google Docs. Check it out here at Product Hunt! I talked to many Designers using this tool and what they really like 😍 is that it's incredibly simple to share and dicuss your work with clients💰 and developers🔧, because boards can be commented and viewed without signup🎉. Although for editing purposes personal account is required.I also stand by Realtimeboard. Great for visualizing just about anything, collaborating with your team, knowledge sharing.RealTimeBoard is incredibly polished, there is a very high level of maturity, everything seems to just work. It's fast and versatile and full of neat features like the ability to copy and paste a bunch of spreadsheet cells to get as many stickies on the virtual whiteboard in one stroke.
- Twiddla is a setup-free, web-based “meeting playground”. Just click on "Start a new meeting" to get started. You don't have to log in and the pre-defined basic shapes like a box, circle, and triangles are available. Share the URL with the team and they'll be able to join.