Mozilla Thunderbird is a free, open source, cross-platform e-mail and news client developed by the Mozilla Foundation. The project strategy is modeled after Mozilla Firefox, a project aimed at creating a web browser. On December 7, 2004, version 1.0 was released, and received over 500,000 downloads in its first three days of release, and 1,000,000 in 10 days.
- Mozilla Messaging, Mozilla Foundation
- Windows XP, Windows Vista, Windows 7, Linux, Mac OS X, OpenSolaris
- MPL/GPL/LGPL tri-license
- English (British), English (US), Afrikaans, Albanian, Arabic, Basque, Belarusian, Bulgarian, Catalan, Chinese (Simplified), Chinese (Traditional), Czech, Danish, Dutch, Estonian, Finnish, French, Frisian, Galician, Georgian, German, Greek, Hebrew, Hungarian, Icelandic, Indonesian, Irish, Italian, Japanese, Korean, Lithuanian, Norwegian (Bokmål), Norwegian (Nynorsk), Polish, Portuguese (Brazilian), Portuguese (Portugal), Punjabi, Romanian, Russian, Serbian, Sinhala, Slovak, Spanish (Argentina), Spanish (Spain), Swedish, Tamil (Sri Lanka), Turkish, Ukrainian, Vietnamese