PopTray

PopTray screenshots

Poptray is a great e-mail checker that is free and works great
Accounts
PopTray 3.2 : Accounts

Alternative downloads

POP Peeper
An email notifier that runs in your Windows taskbar.
4.4
Smart Mail Notifier
Smart Mail Notifier checks your e-mail box and informs about incoming letters.
2.0
FREE
Command Line POP Client
Console utility that allows you to receive your e-mails to a local directory.
1.01
FREE