Touchbase - Contact Form Builder - Build beautiful contact forms, feedback forms, registration forms and surveys for your website.
Mailwasher - Over 8 million people use MailWasher as their spam filter
Web Form SPAM Protection - With this utility you can easily enrypt your html web forms and protect them against SPAM e-mails
SPAMfighter - SPAMfighter and Microsoft have built the strongest and most effective anti spam filter for Outlook, Windows Live Mail, Outlook Express & Thunderbird
Google Forms - Simple web forms from Google.
Spam Reader - Spam Reader is a free anti-spam add-on for Microsoft Outlook.