Open Source for Mac OS X

If you like Firefox’s tabbed browsing, you’re going to love tabbed email. Tabbed email lets you load emails in separate tabs so you can quickly jump between them. Perhaps you’re responding to an email and need to refer back to an earlier email. Tabbed email lets you keep multiple emails open for easy reference.

Search

The new search interface in Thunderbird 3 contains filtering and timeline tools to pinpoint the exact email you’re looking for. Thunderbird 3 also indexes all of your emails to help you search even faster. Your search results are displayed in a tab so you can easily switch back and forth to your search results and other email.