Turbocharge Gmail with These Apps and Add-ons

Businesses are flocking to Gmail in droves, and with good reason: It's arguably the best Web-based mail service on the planet. If you're one of the cool kids (i.e., a Gmail user), check out Lifehacker's list of the top 10 Gmail applications and add-ons. Many of them require Firefox (which certainly isn't a bad thing -- it's my browser of choice), but all of them are free and undeniably useful. I'm not sure I can pick a favorite, but I'm definitely a fan of #7:

The Gmail Manager Firefox extension not only logs you into multiple Gmail accounts at once, but also offers you easy access to unread e-mail information right in your Firefox status bar (no open tabs required!)