Googsystray is a system tray app for Google Voice, GMail, Google Calendar, Google Reader, and Google Docs. It notifies on new messages, alerts, etc., and provides basic services quickly.
hangs on Windows XP
Configuration hangs on Windows XP.
Fantastic idea, but not usable: it crashes because I have more than 50 unread emails. People cannot be expected to read all of their emails! Once that bug is fixed, then I will be able to use it.