1)   Ad Nuker Popup Blocker & Spam Filter 4.6.0.0
Filter Junk E-Mail Spam, Ads, Pop Ups advertising, Viruses, Tojans & Spyware. Works with POP3 & IMAP. This FREE tool uses intelligent filtering of annoying Popup ads, e-mail spam, Spyware, Adware, Trojans, Viruses, Spyware Cookies and much much more

 2)   Spam Nullifier Pro 3.7.0.2
Eliminate Junk E-Mail Spam, Viruses, Tojans & Spyware. Works with POP3, IMAP, HTTP. Spam Nullifier is a powerful e-mail checker programs with effective spam elimination. This FREE Anti Spam Filter stops unwanted viruses, trojans & spam e-mails.

 3)   Messenger Spam Block 1.0
Easily stop messenger spam pop-ups from appearing on your computer with a small free utility: Messenger Spam Filter. Messenger Spam Filter temporarily deactivates or permanently disables the Messenger service, protecting you from pop-up windows.

 4)   Spam Nullifier 3.4.0.1
Eliminate Junk E-Mail Spam, Viruses, Tojans & Spyware. Works with POP3 & IMAP. Spam Nullifier is a powerful e-mail checker programs with effective spam elimination. This FREE Anti Spam Filter stops unwanted viruses, trojans & spam e-mails.