The book "Exploding The Phone" goes into all of these stories and much more. If you ever wanted to know about how and why the analog phone system was so hackable/phreakable, this book is for you.

[0] http://explodingthephone.com/

Captain Crunch!

Yes, that's the most famous application. As to why it worked...that's the more interesting story IMHO.

And Wozniak had his blue boxes