contact database needed

Building a WordPress website for a non-profit.

I am looking for a high rated plug-in that will collect a contact database name,organization, email,phone,address,website,etc…) into a file. Ideally that can be exported to excel, or some other useful format. To expand on this… I’d like to use this contact list to manage e-blasts, mailers, etc…

I’d even consider something that works like paypal, where you drop html code into a WordPress page, and then the code feeds the info to the contact management website.

Thanks!
Lisa