WP-CRM WordPress plugin by andypotanin is in beta stage.
This plugin is intended to improve user management, easily create contact forms, and keep track of incoming contact form messages.
Excellent user organization, filtering and editing.
Ability to easily add new user data attributes (i.e. Company Name).
Contact Message Management.
Keep track of customer, client and vendor notes.
The author welcomes feedback at: http://feedback.twincitiestech.com/forums/95259-wp-property