Sk-etchbook

I recently got asked to produce an email marketing campaign. I've been looking into some of the available software out there for client relations and mailing list management.

Opensource Newsletter & CRM Software
www.sugarcrm.com
www.vtiger.org
www.phplist.com
www.openemm.org

Paid Hosted CRM Service Comparison
Business Buy Guide

Free & Subscription Based Software
www.mailchimp.com
www.infusionsoft.com
www.sendblaster.com
www.sage.co.uk/software_and_services/customers/sage_crm.aspx

Reviews and Discussions
http://www.siteground.com/sugarcrm_vtiger.htm
http://www.freedownloadscenter.com/Search/email_marketing.html
http://email.about.com/od/windowsmarketingsoftware/Windows_Email_Marketing_Software.htm

Surveys
http://www.limesurvey.org/