Flamingo Address Book WordPress Plugin
Flamingo is a free WordPress plugin created to be a total CRM package. With this version, you can manage your contact list and messages submitted via contact form plugins. It has not yet matured, but we are enhancing it rapidly. I have recently used it in our website. It store complete information submitted by the visitor as well as additional information like ip address, browser, url etc. Important thing it also support Contact Form 7.