MailChecker32 3.6.0 - 32 New Messages

From the biff man page: "The biff command appeared in 4.0BSD. It was named after the dog of Heidi Stettner. He died in August 1993, at 15." Biff lets you know when new mail arrives on a Unix console. MailChecker32 does it on Windows, though not as elegantly, and not as elegantly named either:
MailChecker32 is a simple, but functional mail checker that optionally notifies you only about messages matching certain conditions. (Windows)