Email Riddler (online tool)

Description: Email Riddler is an online tool that encrypts and transform your email address into a series of numbers when displaying it, making it virtually impossible for spam harvesters to crawl and add your email to their list.
...
original link

Javascript Email Address Protection

Protect your email address from being leeched from your website by using javascript. Most automated email leeching programs look for MAILTO tags and properly formatted email addresses. By converting your email address to javascript, these programs aren't able to detect your email address.^
...
original link