Preceden - Preceden makes it easy to build simple, powerful timelines
Plot Factory - Online story planner, organizer, and writing application.
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.
World Anvil - World Anvil is a worldbuilding tool for Authors, Storytellers and worldbuilding lovers.
Tiki-Toki - Tiki-Toki is web-based timeline software for creating beautiful interactive timelines that you can share on the web.
Plottr - The #1 rated visual book planning and series bible software for professional and aspiring writers.