Webmail clients have pretty much advanced to the point now where we aren’t wishing for much more. Outlook still plays an important role in the Enterprise helping to tie together contacts, calendar, and mail into one application, and for everyone else with offline needs, there is Thunderbird. Thunderbird as an open source project has always been the gold standard on the PC as a free alternative to Outlook, even though it has never enjoyed anywhere near the same market share as Mozilla’s other open source baby. You may have heard of Firefox perhaps?
Today however, Mozilla announced that key resources from Thunderbird project are being moved to other areas, and aside from bug fixes and security updates, no new improvements are being planned going forward.