MailTab for Gmail is described as 'is the ideal app for instantly accessing your Gmail account without having to open your web browser. Download it for free and benefit from visual and audio mail notifications, quick access to your inbox and the ability to respond to mails at lightning speed'. There are more than 25 alternatives to MailTab for Gmail for a variety of platforms, including Mac, Windows, Linux, Firefox and Opera. The best alternative is Postbox. It's not free, so if you're looking for a free alternative, you could try POP Peeper or Kiwi for Gmail. Other great apps like MailTab for Gmail are Unibox (Paid), Mia for Gmail (Freemium), Gmail Notifier Pro (Free Personal) and Notifier for Gmail (Free, Open Source).
Postbox is an email application that helps you organize your work life and get stuff done. It has all the elegance and simplicity of Apple Mail, but with more power and flexibility to manage even the most demanding workloads.
POP Peeper is an email notifier that runs in your Windows task bar and alerts you when you have new email on your POP3, IMAP (with IDLE support), Hotmail\MSN\LiveMail, Yahoo, GMail, Mail.com, MyWay, Excite, iWon, Lycos.com, RediffMail, Juno and NetZero accounts.
Kiwi for Gmail (formerly Gmail for Mac) turns Gmail into a full-powered desktop email client. No one wants to use Gmail in the browser on their phone, and we felt they shouldn't have to on Mac or Windows either.
Mia is a native Gmail application on your Mac's menu bar! Read and compose your emails without a browser (attachment files supported). Quick email overview (pass your mouse over an email). Desktop notifications for incoming emails (10.8+).
Gmail Notifier Pro is a Windows application capable of checking multiple Gmail accounts for new mail and display notifications. Feature highlights - Check multiple Gmail accounts, including Google Apps, for new mail. - Supports both Atom and IMAP protocols for mail.
Features: 1. No requirement to enter your credentials. 2. Multiple account support 3. Multiple label support 4. Low bandwidth usage by using RSS technology 5. Mark as read, report spam, trash or archive messages right from browser's toolbar
Boxy 2 is finally here. This is a minimal and powerful e-mail client you’ll fall in love with, and it’s been rebuilt from the ground up with new features and themes, a thoroughly refined interface and countless improvements.