Realm Works - Realm Works is a database software and worldbuilding tool for roleplaying games.
Toyhouse - Toyhouse is a platform that allows users to build up characters foe their games and stories.
Plottr - The #1 rated visual book planning and series bible software for professional and aspiring writers.
World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.
Kanka.io - Kanka.
Refsheet.net - Refsheet.