I've made some open source projects available on GitHub:

CI Alerts - A CodeIgniter package to save and display different types of alerts. It wraps alerts with html based on the type of alert.

CI Authentication - A CodeIgniter authentication package for complete authentication management.

Carabiner - a fork of Tony Dewan's Carabiner library. This version also accepts and compiles .less files.

Base CodeIgniter App - a preconfigured codeigniter app with some useful submodules such as carabiner, authentication, twitter bootstrap, and PHPUnit.

Bookymark - a sample CodeIgniter app using all of the above libraries, general CodeIgniter best practices, and fully unit tested. Example app is live on bookymark.com.

I hope this will help you develop CodeIgniter apps more easily!