Spiffy is a Gmail notifier for Windows, it's free and completely customizable. Check it out...
Features
* Support for 2 Gmail accounts (inbox or custom label)
* Skinnable tray popup alerts on new Email (optional)
* Tray icon change on new Email (optional)
* Sound alert on new Email (optional, mp3, wav)
* Set custom 'check for mail' interval (all accounts)
* Show alerts once or until read in Gmail
* Tell Me Again feature for missed alerts
* Proxy support (supports authentication)
* Customizable GUI
* Runs in System Tray.

SoftSea.com had fully tested and uploaded the install files, Spiffy does not contain any adware or spyware, the latest version is 0.5.11, you can download this software (683.5 KB) from special server of SoftSea.com.

The license of this software is Freeware, you can free download and free use this email checker software.