Most Mac users default to Apple's good-but-not-great Mail program to manage their e-mail. But given Mail's serious deficiencies (e.g., weak to nonexistent integration with calendaring and contacts), a variety of open-source initiatives are underway to bring a full-featured e-mail client to the Mac.
That's the good news.
The bad news is that there appears to be little to no coordination between the different groups, leading to duplication and fragmentation of efforts.
Zimbra, Mozilla Thunderbird, Mozilla Raindrop, and a new project initiated by NetNewsWire founder Brent Simmons, Letters.app, all seem to be heading in the right … Read more