Usually I'm not a big fan of campaign notebooks, as the the creator's design seldom matches the note-taking needs of my campaigns. But I have to admit that this beautifully designed, Creative Commons licensed PDF notebook may change my mind:
The PDF file is available with a Pay What You Want price tag:
https://www.drivethrurpg.com/product/250244/The-Chronodex--Core-Set
http://www.thechronodex.com/The Chronodex is a thoughtful, versatile and personal narrative tool. And it’s totally free. It’s been carefully designed to guide and organize RPG and literary pursuits.
The PDF file is available with a Pay What You Want price tag:
https://www.drivethrurpg.com/product/250244/The-Chronodex--Core-Set