Tray Helper it's small award winning application with many features (f/e: email checker, anti-spam, popup-killer, event reminder and more).
There was a new version released recently (2.4) with following changes:
Some improvements to install and uninstall utility (more XP compatible).
Removed small bug in forwarding e-mails to mobile device.
Improved a bit build-in email reader.
You can set Tray Helper to show time in 12 hours (PM/AM) format.
Current time & date could be shown on tool tip of tray icon.
Email filters now are more powerful, there is also support for multiple mobile devices.
Tray Helper can take advantage of Microsoft Agent Characters -
it means that those live, speaking characters can notify you about new mail, reminders ect.