[pat87]

Name one?

[dwwoelfel]

Precursor, a prototyping tool I worked on, had "multiplayer" mode way before figma https://precursorapp.com/

I'm certain they were aware of it. We had a signup from a Figma domain in 2015 and I emailed them about Precursor in 2016 before they had implemented multiplayer.

[tlrobinson]

It's a wireframe tool, but Mockingbird: https://www.gomockingbird.com/