Email Link Encoder is a free software which lets create a image out of your email id so that email spider cannot extract email address from different places on web.
Email spiders crawl web pages over the web on various web sites to get various email id for spammers which add you to their mailing list and start sending spamming mails on these ids.
Email Link Encoder allows you to create protect email id signature in the form of a image, encrypted HTML link and javascript which again prevents your email to get grabbed by email spiders.