POP Peeper is an email notifier that runs in your Windows taskbar and alerts you when you have new email.

IMAP supports allows you to access AOL, AIM, Netscape, and other services. Send mail directly from POP Peeper and use the address book to email your frequently used contacts. POP Peeper allows you to view messages using HTML or you can choose to view all messages in rich or plain text safely. Several options are available that will decrease or eliminate the risks of reading your email (viruses, javascript, web bugs, etc.). POP Peeper can be run from a portable device and can be password protected. Many notification options are available to indicate when new mail has arrived. These options include sound alerts (configurable for each account), flashing scroll lock, skinnable popup notifier, customized screensaver, and more.

POP Peeper Features:

Easy Setup - accounts are imported from your existing email client(s)
Supports POP3, IMAP (including GMail, AOL, AIM, Netscape, FastMail, mail.com, etc), SMTP, GMail, HotmailMSNLiveMail, Yahoo, MyWay, Excite, iWon, Lycos.com, RediffMail, Juno, NetZero
IDLE is supported for IMAP accounts which allows instant notification when new mail arrives in your inbox
Support for RSS feeds is available with purchase of the Premium Add-on Pack
Read, delete, print and reply to Email without opening your email client
Send email directly from POP Peeper
SSL support for POP3, IMAP and SMTP
HTML email support
Password protection
Address book
Options to protect you from messages that contain viruses and web bugs
Send, save and open file attachments
Run POP Peeper off your portable storage device
No account limit -- notifies you of an unlimited number of accounts
Many ways to receive new mail notification: skinnable desktop alerts, audio, flashing scroll lock LED and more
Specify how often all accounts are checked for new mail or set individual intervals for each account
Extensive help with useful tips and information