RealTime Validator
This makes the form completion process interactive (can be enabled/disabled).
Powerful CAPTCHA
You can use letters, numbers or both (can be enabled/disabled)
Auto Responder
Useful to notify your visitors that their message was successfully sent
Fully Customizable
Easy Add/Remove fields, Notifications, Mail Information
Tableless
Clean Layout (uses LABELs, DIVs and Paragraphs)
Degrades if JS disabled
The form degrades gracefully into a simple PHP Contact Form.
Custom 'Thank You' Page
You can redirect the user to a custom thank you page
Documentation
A help page that guides you through the setup process