1)   Autoresponder and Mailing List Manager 4.1
A free email autoresponder and mailing list management software FMLP. When a visitor fills up a subscribe form on your website, it automatically adds the visitor to a mailing list and begins the followup. Lots of testimonials. Free support forum.

 2)   Live Email Autoresponder 2.0
Email Autoresponder is an easy desktop email marketing software that delivers your autoresponders ranging from the simplest "I'm out of office" to personalized HTML messages and newsletters.