Specifically, LibreOffice Impress [0] is the presentation application.
The other big open-source office suite is Calligra. Although not as popular as LibreOffice, it is still actively developed. Its presentation application is Stage [1].
I'll second LibreOffice. It's much more polished than OpenOffice, and it's quite functional and mature. It has definitely gotten the TLC that OpenOffice so desperately needed about 10 years ago. I'm not sure if it has the infinite canvas that the OP is looking for, but it's definitely nothing to sneeze at.
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No one has mentioned LibreOffice?
Specifically, LibreOffice Impress [0] is the presentation application.
The other big open-source office suite is Calligra. Although not as popular as LibreOffice, it is still actively developed. Its presentation application is Stage [1].
[0] https://www.libreoffice.org/discover/impress/
[1] https://www.calligra.org/stage/
I'll second LibreOffice. It's much more polished than OpenOffice, and it's quite functional and mature. It has definitely gotten the TLC that OpenOffice so desperately needed about 10 years ago. I'm not sure if it has the infinite canvas that the OP is looking for, but it's definitely nothing to sneeze at.
It's more polished because the (almost) entire team of OpenOffice left and created the LibreOffice project, AFAIK.
Same as what happened with MySQL -> MariaDB.