My latest download that I really like is
E-prompter. This little program sits in your system tray and checks almost every email account that you have. It alerts you whenever you have new mail, and it can check hotmail and yahoo accounts. I have a few email addresses after several years of being online, and this makes it much easier to keep track of some of the accounts. The only problem that I have with it is that it doesn't support excite.com yet.