What is the third_party folder for in CodeIgniter 2.0?

[eluser]Jayson Ng[/eluser]
I noticed that CodeIgniter implemented the third_party folder system that is in EE2. I understand that in EE, you place your modules in it.
But what can I do with it in there for in CodeIgniter?

thanks,

[eluser]InsiteFX[/eluser]
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CodeIgniter Packages

InsiteFX