AntiSpamWare: works with a POP3, IMAP, Aol or Hotmail account. Available for Windows 9X/NT/2000/XP.
Apdsoft: Automatically scans a POP3 mailbox and removes spam, virus-unsafe and other unwanted messages, based on rules set by the user.
Cloudmark Desktop: Add-in for Outlook and Outlook Express which identifies spam by checking each message in the inbox against a database.
Disruptor OL: Antispam filter for Outlook 2000/XP. Works with POP3, IMAP or exchange. It includes Bayesian filter, white/black lists, scoring.
Ella: A plugin for Outlook that works for a POP3 account. Available for 2000/XP.
Email Remover: Retrieves just the headers of the email and lets users selectively download only the mail they want.
Herbivore: Filters your e-mail from a POP3 or IMAP servers by creating a digital signature for each message. Allows customization.
IHateSpam: An add-on for Outlook/Outlook Express which quarantines possible spam.
Inbox Protector: Add in for Outlook 2000/XP that works in a POP3 inbox. It includes customizable filters and white and black lists.
Inboxer: Filter for Outlook which uses Bayesian analysis to detect Spam.
Junk-Out: Bayesian junk mail filtering integrated directly into Microsoft Outlook.
JunkMuncher: Runs on all the Windows platforms starting at Win95. It only supports the POP3 protocol.
K9: Uses Bayesian filtering together with a POP3 account.
Lockspam: An add on for Microsoft Outlook users. Includes white/black lists. Free for individual users
Mail Unknown Anti-Spam: Filter for a POP3 e-mail server that uses authentication as a way to filter spam.
Mailboxfilter: A spam filter that sorts mail into folders, it includes virus protection. Available for Windows 9X/ME/2000/NT.
MailMate: Filter for a POP3 inbox. Built-in and customizable rules,white/black lists.
MailShield: Filter that uses fuzzy logic, customizable filters, white/black lists to remove spam.
MailSweep: Permits browsing the mailbox before downloading full messages.
Mailwasher: Protects your computer from unwanted email spam and stops viruses before you download them.
Misermail: E-mail program whose main feature is to access a POP3 account and filter spam.
Norton AntiSpam: Filters messages from a POP3 inbox and some major email service providers.
Outlook Spam Filter: Uses Bayesian algorithm, friends lists and customizable keywords to filter your e-mail.
POPFile: Filter for your POP3 inbox. It uses Bayesian filtering.
PSFPOP3: Application that fetches and filters mail from any POP3 account.
QuarantineMail: Add-in for Microsoft Outlook 2000/XP that filters known senders to your inbox and challenges others.
Qurb: Anti-spam software for Microsoft Outlook that uses an approved sender list rather than content-based filters.
SortMonster: Filters spam by content against a subscription database containing thousands of rules.
Spam Agent: Filters a POP3 or IMAP account, works with any client and any version of Windows.
Spam Alarm: Filter that uses statistical analysis of words to stop spam. Available for POP3 accounts and as a plugin for Outlook.
Spam Blocker: Spam Blocker features VBA-enabled filtering technology that integrates tightly with Microsoft Outlook 2000/2002.
Spam Bully: Email filter for a POP3 inbox. Includes a self learning spam filter and friends/spammers list. (Win 98/ME/2000/XP)
Spam Buster: This filter requires a POP3 account. Available for Windows 9X/2000/ME/NT.
Spam Control: Filtering tool for Outlook. It creates messages so that you can report spam to SpamCop.
Spam Counter Strike: An Easy to use anti spam and junk email filter that works with a POP3 server. Available for Windows 98/ME/NT/2000/XP.
Spam Deputy: Filter tool for spam. Requires subscription to SpamCop.
Spam Fighter: FIlter for Outlook. Works with POP3/IMAP servers.
Spam Filter: Filter for Eudora which uses a preset set of rules for filtering spam.
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SpamAid: SpamAid is an add-on for Microsoft Outlook 2000/XP/2003. It operates under Microsoft Windows 98/ME/NT/2000/XP. Uses Bayesian filtering, friends and enemies lists, and can evaluate if outgoing messages will be treated as spam.
SpamBrave: A plugin for Outlook Express which uses statistical analysis to filter Spam. Works with a POP3 inbox. (Windows 98/ME/NT/2000/XP)
SpamBurner: A comercial e-mail reader that also filters spam. Available for Windows 9X/2000/ME/NT/XP.
SpamButcher: Fuzzy-logic based anti-spam filter for Windows systems.
SpamEater Pro: Email filtering system that can automatically receive periodic updates to its filtering rules.
Spamihilator: Filter that works with any POP3 client. Uses Bayesian filtering.
SpamKiller: Offering five different filter types that let you filter on any part of a message.
Spamlook 2003: Bayesian spam filter specifically for POP3 accounts and Microsoft Outlook 2000/2002/2003.
SpamMonitor: SpamMonitor works in conjunction with file based mail servers, like Mdaemon, MailCoach, MS SMTP service, Winroute, etc. It will monitor for new files with a certain extension and passes all new messages to the spam filter.
SpamPal: A free filter that uses DNSBL lists to filter an IMAP or POP3 account.
SpamWeed: Bayesian spam filter for Outlook Express, Outlook and all POP3 clients. Available for Windows 98/ME/NT/2000/XP.
StandBayeMail: Java POP3 proxy that classifies mail using a Bayesian filter.
Turing Test Junk Mail Purger: A simple spam filter for MS Outlook 2000/XP that uses Turing Tests to filter spam-bots. Freeware.