These two plugins probably needed in the future. Or not.

Want to display an interactive timeline on your WordPress site? Learn how to add beautiful event timeline in WordPress without changing themes.

Source: How to Add Beautiful Event Timeline in WordPress

This uses Timeline Express.

Do you want users to agree with terms and conditions on your WordPress site? See how to add privacy policy and terms of service agreement in WordPress.

Source: How to Require Terms of Service Agreement in WordPress

And this one uses Agreeable.