Program for a Customer Databases
 

I'm looking for some software that is for creating and maintaining customer databases. Like an address book with a lot more options. Contact information, date entered maybe, reason for entering, other business type entries. This is for a business, so I can't just use Windows address book, I'm really just looking for someone to spit off some good customer database programs that they have experience with and can inform me a bit about it. This isn't necessarily a request for software, it is discussing what software I might want for my specific purposes. Thank you.

I used Microsoft Access a while back and it was pretty nice. Since it's part of the Office suite it should integrate into all of their other software pretty nicely, too.

We use Filemaker at work. It's pretty customizable so it should work.