Mozilla released a couple new versions of its popular Thunderbird email client today, Thunderbird v3.1.16 and v8.0, along with the 1.0 launch of Lightning, a fully integrated calendar add-on for Thunderbird that lets users organize schedules and events. More importantly, the combination of Thunderbird 8 and Lightning 1.0 gives open-source advocates a free and fully featured replacement for Microsoft's Outlook client.
The new Thunderbird client is available in 51 languages and is based on the Mozilla Gecko 8 engine, the same one found in Mozilla's Firefox 8 browser. Improvements include:
Add-ons installed by third-party programs are now disabled by default