Spam Nullifier   
http://www.SpamNullifier.com

Eliminate Junk E-Mail Spam, Viruses, Tojans & Spyware. Works with POP3 & IMAP. Spam Nullifier FREE Anti Spam Filter is a powerful e-mail checker programs with effective spam elimination. Discover the safe way to stop unwanted viruses & spam e-mails before they get to your computer. Can even be used as an effective privacy tool. You will find this to be the easiest, most effective way to manage your incoming e-mails like a pro in seconds. SpamNullifier is the best solution to fight the spam mails in your e-mail accounts. Filters the messages using a multiple criteria like spam words, friend list, blocked list, and state of the art algorithm rules. Your account passwords are encrypted by a powerful encryption technique, so its too difficult for any one to hack to obtain your passwords. All messages text whatever deleted or resident in the mailbox are saved in your hard drive and appears in the main window list, the reason for deletion or existence and other checking information are also stated, of course you can delete any message from the history to save your hard drive space. Log file for any checking action can be written. Supports POP3 & IMAP servers, HTTP servers like Yahoo! and Hotmial will be supported in the PRO version.

Spam Nullifier Pro   
http://www.SpamNullifier.com

Eliminate Junk E-Mail Spam, Viruses, Tojans, Spyware. Works with POP3, IMAP, HTTP servers like Yahoo! & Hotmial. This Anti Spam Filter - powerful e-mail checker programs with effective spam elimination. Discover the safe way to stop unwanted viruses & spam e-mails before they get to your PC. Can be used as an effective privacy tool. This is the easiest, most effective way to manage your incoming e-mails like a pro in seconds. Spam Nullifier pro is the best solution to fight the spam mails in your e-mail accounts. Filters the messages using a multiple criteria like spam words, friend list, blocked list, & state of the art algorithm rules. Your account passwords are encrypted by a powerful encryption technique, so its too difficult for any one to hack your passwords. All messages text whatever deleted or resident in the mailbox are saved in your hard drive and appears in the main window list, the reason for deletion or existence and other checking information are also stated.

SpamWeed Anti-Spam Filter   
http://www.spamweed.com

SpamWeed is an innovative spam filter for all POP3 email clients (Outlook, Outlook Express, Eudora, Incredimail, Pegasus Mail and others). It uses a combination of statistical classification, ID-tracking and other state-of-the-art technologies. SpamWeed can block over 95% spam instantly with almost no false positives. Emails classified as spam are placed in a quarantine area and can be safely retrieved or deleted. Auto-learning feature further increases detection accuracy by analysis of users' correspondence. The program can even neutralize all current and future email viruses. While it's powerful and intelligent, it's also very easy to install and requires almost no maintenance. Your time is precious, let SpamWeed handle all those annoying junks.

TNL Antispam   
http://www.tnlsoft.com

Spam is a growing problem and states are struggling to pass laws, but as most of us know most spam doesn't come from any particular state, or country for that matter. The internet has no borders and most spammers use tactics that prevent them from being traced in the first place. Many have toyed with the anti-spam software that utilizes public blacklists, white lists and/or filters, and most walk away dismayed about how much email is lost due to false positives (mistaken for spam). Even some of the best software out there is time consuming to use. Many people have had the unfortunate experience of their website getting added to a public blacklist by mistake and had to deal with the time-consuming task of getting taken off these lists. TNL Antispam will check your POP3 Email box and weed through your incoming mail messages. There are several processes that TNL Antispam uses to eliminate spam from your inbox. Using a combination of filter and challenge & response technology TNL Antispam proudly offers an unheard of false-positive rate (legitimate email falsely marked as spam), with minimal user intervention.

VanMail   
http://www.vandaveer.com

VanMail is a powerful POP3/SMTP email client that allows you to manage your email with ease. With VanMail's powerful built-in SPAM protection, you control the emails you want to receive. VanMail comes with a powerful rules based system where you can create rules to block emails, whitelist rules (i.e. never block), auto-response rules, alert rules, etc. VanMail also comes with an advanced challenge-response system. You can even configure VanMail to encrypt your downloaded email so that others who have access to your system can't read your email.