CodeIgniter 2.0.2 and compatable libraries

[eluser]LuckyFella73[/eluser]
If you need an auth library you should be fine with
Tank_auth or Ion_auth. These two seem to be the most
recommended around these forum - correct me if I'm wrong.
For sure there are others too that might be good for your needs.

Your question "which libraries are CI 2 compatible" is
a bit loose - there is no catalogue as far as I know.
Better ask for the libraries you want to use to get some infos
about that.

Welcome around CI Forums btw