Forfree.at - Includes POP3 email access.
HotPOP - offers two types of services. One is a POP account. This is an email account which you connect to through a POP client, such as Netscape Mail or Outlook Express. The other service is a forwarding service. This simply allows you to have an alternate address, but have it sent to an existing mailbox.
Freindly Email - A POP3 email account for free.
Mail and News - Offers POP3 mail access, and voice email access.
AmExMail - With AmExMail you receive a free permanent e-mail address that doesn't change no matter how often you change ISPs, employment or schools. You can retrieve your e-mail from a POP mail account and since AmExMail is web-based, you can access your e-mail from any Internet-connected computer.