Thunderbird is already a solid email program that's popular with lots of users, but Mozilla just introduced a massive new update that's making it even better. Download the 38.0.1 update now to take advantage of security patches, bug fixes and some cool new tools.
Thunderbird fans will notice a few major changes immediately. First, Mozilla has decided to integrate the popular calendar add-on Lightning right into Thunderbird's calendar. Lightning allows you to create to-do lists, manage several calendars and even share calendars with others.
Mozilla has also added Yahoo Messenger support to Thunderbird's chat feature. Previously, the Thunderbird Chat only supported Facebook, Google Talk, IRC, Twitter and XMPP.