Rez: choice HTML; for those comfortable with JavaScript
Evergreen: choice IF focusing on ease of writing and mobile reading
Iffinity: command-line browser-playable choice/hyperlink
StoryMoar: website for coding choice IF
MEOW: choice/CYOA
DendryNexus: StoryNexus in Dendry; browser-based
StoryMate: focus on making choice IF alongside AI
There’s definitely more.