World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.
Notebook.ai - A smart notebook that grows and collaborates with you
Kanka.io - Kanka.
Moleskine Smart Notebook - Turn hand-drawn sketches into fully workable vector files
Refsheet.net - Refsheet.
Toyhouse - Toyhouse is a platform that allows users to build up characters foe their games and stories.