Windows Live Hotmail is the latest iteration of Microsoft's free, Web-based e-mail service. The multipane interface lets you drag and drop messages into folders, or right-click messages for a menu of options. There's also a "Today" tab of news, both international and social, that loads when you sign in. Windows Live Hotmail even lets you choose a color theme in case you feel like customizing it to match your tastes.
Microsoft has also rolled out some useful features like instant spell-check, a built-in audio player, an RSS feed reader, and previews for Office documents and PDFs. Its latest version includes 5GB of storage, better calendaring sharing, and address book management.