Recommended libraries with Codeigniter.

Hi,
Here are few libraries which I use and recommend with Codeigniter.
Ion Authentication Library Very comfortable to use Authentication Library.
Grocery CRUD Good CRUD with great features.
Dynamic Menu Generated drop-down or other navigation menu through database.
(though I have done some modification in the library to be used with Free CSS Drop-Down Menu which I will be posting later.
Firephp for debugging, logging etc.