Its Web-browsing vulpine sibling may get all the attention, but Mozilla's other product, the Thunderbird open-source e-mail client, has its own devout following, and has now taken flight with a new version. Thunderbird 2 was strictly for power users, but version 3 changes all that. It's as simple as pie, having cut down on the number of toolbar options and simplified mail account setup. It also adds tabs and archiving. Based on the same code platform as Firefox, Thunderbird also boasts a wealth of add-ins to customize and extend its capabilities. Unfortunately, it still leaves business users out in the cold, as it lacks Exchange support—something that even Apple's new OS, Snow Leopard, offers.