CRM Plug-in Feature Request or other options

I'm wondering if you have any plans to create a plug-in to handle CRM functions, track various user tiers, communications, standardize responses, calendar items, to-dos, etc?

If not, what do you have in the arsenal that will work for this?

It would be nice to have something that could use Gravity Forms on the front end for capture, but get a lot more capability on the back end.