##Sparrow
Sparrow's hallmark is a simplified user interface reminiscent of Twitter clients such as Tweetie or iOS apps, as opposed to a more traditional e-mail style such as Apple's Mail or Mozilla Thunderbird.
Sparrow currently only works with Gmail and Google Apps accounts via IMAP, although other IMAP email accounts will be supported in future releases. It also includes features such as drag-and-drop attachments, Growl support, and keyboard shortcuts, as well as threaded replies and easy switching between Gmail accounts.
