Specifically designed for wordpress blogs. Contact Form 7 can manage multiple contact forms, plus you can customize the form and the mail contents flexibly with simple markup.
http://wordpress.org/extend/plugins/contact-form-7/
Widgets · Feedback Forms and Surveys
Get access to data on 17,383,806 websites that are Contact Form 7 Customers. We know of 2,000,001 live websites using Contact Form 7 and an additional 15,383,805 sites that used Contact Form 7 historically and 1,002,002 websites in the United States.
Get a list of 17,383,806 websites using Contact Form 7 which includes location information, hosting data, contact details, 2,000,001 currently live websites and an additional 829,867 domains that redirect to sites in this list. 15,383,805 sites that used this technology previously and 1,002,002 websites in the United States currently using Contact Form 7.