Disclaimer: I have nothing to do with this product other than that I bought it and like it.

Aeon Timeline is a timeline editor. You build events on a timeline and add persons with roles, history, links, ... whatever you'd like.

It has a deep tag / coding system.

It has parent-child relationships allowing overview and detail view encapsulation.

I've been using it for a couple of days after finding out about it through an ad, and since managing timelines is something I like to do, ... I jumped in.

There is a trial available but more notably it is $25 right now, and will be for a couple more weeks.

If you like timelines, if you like using software to manage your story / world / ... then this is an interesting tool.

So far it has had both everything I need and several things I didn't know I need....

http://www.aeontimeline.com