Spiffy is an advanced Gmail notifier for Windows, it's free and completely customizable.

Changelog:
added localization support
added dutch, italian and spanish translations (Thanks Andrea and Carlos)
added height option for message field in custom alert (Thanks keisinger)
added more options to font size settings (log and alert)

Program Information Category: Tools and Utilities Type: Free Version: 0.5.0 Size: 270KB Works on: Windows Product page: here