PHP Contact Form v.2.0WP
This easy-to-install contact form has many accessibility, usability, and security features.
WordPress Email Notification
Plugin allows people to be notified when a new entry is posted.
AJAX Contact Form
A very light weight, simple plugin that offers a quick, simple, functional contact form powered by ajax.
Secure Form Mailer Plugin For Wordpress
Secure the blog Contact Form to prevent it from being used to send spam mails.
The plugin provides a robust subscription management system for WordPress blogs. Wp-cron is needed for daily status and the future post notifications.
WP-Cron
Allows update to database at a preset time. A helper plugin for other plugin needed database update.
WP Campaign Monitor
Email newsletter/ SMS tool built for WP users who want to send campaigns, track the results and manage their subscribers.
Complete List Management Solution for your weblog.
Newsletter Manager
Integrates a newsletter manager to your blog.
Survey Gizmo
Use SurveyGizmo to build powerful, sophisticated and customstyled surveys, but stay in WordPress to monitor responses.
WP Testimonials
The plugin includes the option to display a random testimonial in your sidebar using PHP code for older templates or using a widget for newer themes.