What are your must-have libraries in almost every CI install?

Not mine, but here is a great list of some fabulous resources:

https://github.com/codeigniter-id/awesome-codeigniter

Personally, there are no libraries I use by default. Not that I think this is admirable or good, just the way it is. I have played with CRUD but never use it in reality.

The only exception is I do have my own auth library but to be honest it changes significantly from use to use.

Paul.