Full free maniacs: Desktop Email Notifier

Do you have 2 or more gmail, hotmail or yahoo account? Here is the perfect solution to people who have multiple accounts in different email servers and the best thing about it, it's free.

I have been using this application for 3 gmail accounts and 2 yahoo accounts ( me and my sister both have a total of 5 accounts). Linking your accounts are easy and it automatically check all the accounts every 15 minutes or so. Be sure that all your important messages will go to the inbox of your email because it just checks the inbox, not the spam (I'm not sure if it can check your spam folder also.

In short this thing is the best application for your desktop for email notification besides its free, it supports many email clients, it checks multiple account, hides in your system tray and a sound notification once new mail is detected.

Here are it's primary features:

Easy Setup - accounts are imported from your existing email client(s)
Supports POP3, IMAP (including GMail, AOL, AIM, FastMail, etc), SMTP, GMail, Hotmail/Outlook.com, 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
Read email in HTML, Rich or Plain text
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 on 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