POP 'N' Check resides in the system tray, checking your mail on POP3 servers on given intervals.
It tells you when you've got new mail! Yay!

• TZ Anti Spam Filter 3.0.0.1
  Eliminate Junk E-Mail Spam, Spyware, Viruses & Tojans. Works with POP3, IMAP, HTTP servers like Yahoo! & Hotmial. This Anti Spam Filter - powerful e-mail checker programs with...

• Mail Inspector 4.1
  Mail Inspector can check for new emails and notify you

• Tech-Pro POP3 Pal 1.1
  POP3 Pal is a mail client for people on the move. It provides an easy way to access your POP3 mail from any Windows-based PC. It can also be used for mailbox maintenance - for example, to delete an unwanted large message that is blocking access to...

• Gexonic E-Mail Notifier 1.0.7
  E-Mail Notifier - it is an easy-to-use e-mail client which checks your mailbox for new messages