Depending on what you're looking for, there's also Ren'Py. https://www.renpy.org/
Doki Doki Literature Club (free on Steam) is written in Ren'Py, and does an incredible number of things I wouldn't have expected from a "visual novel engine".
Doki Doki Literature Club (free on Steam) is written in Ren'Py, and does an incredible number of things I wouldn't have expected from a "visual novel engine".