Minimalist desktop client for Gmail
Screenshots
Sparrow is a handy tool for Gmail users with multiple accounts. The discreet interface feels a little bit like the Tweetie Twitter client with a slick Cocoa finish and an easy-to-scroll-through threaded message window. You can view previews of mails in the main window and click on them to expand the full view. An unread message counter sits in your Menu Bar to keep track of mails and Growl notifications let you know when a new message has arrived.
Most useful of all, you can use Sparrow with as many Gmail accounts as you want, making it easy to switch between different accounts. However, some of the functionality of Gmail is missing. For example, you can't access filtering functions and you can't edit separate signatures for different accounts.
Recently, Sparrow has been updated to support IMAP accounts, which gives it much greater appeal. However, control over those accounts is limited - you can't move mail between IMAP accounts using Sparrow.
If you're a Gmail user looking for a slightly different way to manage your accounts, Sparrow is worth a try.