ChatMapper
7.7#3 in game narrative design softwareFrom $19 a monthFree planWebLinuxmacOSSelf-hosted
VisitChatMapper suits writers and teams designing branching dialogue for games, interactive stories, or learning projects. Its free plan permits commercial use, while Desktop Personal is for personal and non-commercial projects.
TADS suits authors creating interactive fiction who want a programming-language-based system and a supplied game library. Windows users can also use its graphical Workbench; other platforms have command-line tools.