ANT 4 MailChecking is a system-tray utility that lets you know when you have new email messages. It's very easy to set up and includes support for spam filtering. A tiny window remains on your desktop, displaying the number of mails waiting for you.
Countdown Timer that alerts you, when your Pizza is ready. It plays a soundfile to notify you, in case you don't sit in front of your PC. You can customize different profiles, so you can easily use ANT 4 Pizza Timer for various dishes.