UpHabit might be a bit more popular than Timeline. We know about 2 links to it since March 2021 and only 2 links to Timeline. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
This is the best thing I've been able to find, it's pretty limited but it does let you have multiple things going on at once. Source: almost 3 years ago
For timelines I have used http://thetimelineproj.sourceforge.net/ (open source). Source: almost 3 years ago
Have you looked at UpHabit? It appears to match what you’re looking for https://uphabit.com/. Source: almost 2 years ago
I really like Uphabit. It lets you take notes and set reminders, etc. https://uphabit.com/. Source: about 2 years ago
Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."
Dex - One place for your relationships — impress with thoughtfulness
Time.Graphics - Time.Graphics is a timeline and free of charge online service for creating infographics.
Monica - Monica is an open-source personal CRM to keep track of your friends and family.
Preceden - Preceden makes it easy to build simple, powerful timelines
Cloze - Smarter Relationship Management