Use CI as a trimmed-down application to complement other CMSes/ecommerce systems?

[eluser]Jon L[/eluser]
I'm not seeing anything that actually complements existing CMSes. I've now checked the Wiki and CIDirectory (Yash), nothing.

BTW Yash, if that's your website, there's a broken banner at the bottom of CI Directory

EDIT: to clarify, I'm looking for existing CI apps that have been tied into a CMS or ecommerce package. I'd like to see working examples of CI being portable/usable while properly integrated to work with other software packages

Maybe I'm asking too much :-)