Spacedeck
Put images, text, posters on a large canvas. This is an open source alternative to Miro!
Development is being restarted at https://github.com/spacedeck/spacedeck-open
Docker image build available, see comment https://github.com/spacedeck/spacedeck-open/issues/126 .
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information