CI External Libraries

Hi,
i'm new out there and i like CodeIgniter because of his modesty ( ). However, it's very difficult to find external libraries based on CodeIgniter which help to resolve a need. I think that there should be somewhere (even here) a miscellaneous list of Classes and Libraries which can lead to a solid CMS.

I'm creating a new repository on github, which is actually a CMS (Tendoo-CI3), take a look a this .

So i look like to know if there is any list of popular Ci (External) Classes or Library, thanks in advance.

NexoPOS 2.6.2 available on CodeCanyon.