Qt

• Qt 3 - Qt 3 reached end of life status on July 1st, 2007.  After this time Trolltech will not issue new maintenance releases in the Qt 3 series. Extended lifetime support for Qt 3 will be available to premium support customers.
• Qt Visual Studio Addin Collection - The Qt Visual Studio Addin Collection targeting Visual Studio 6, 2002, 2003 and 2005 reached end of life status on March 15 2008. After this time Trolltech will not issue new maintenance releases. We advice existing Addin users to upgrade to the Qt Visual Studio integration available for Visual Studio 2003, 2005 and 2008.

Qt Script for Applications (QSA)

• QSA for Qt 3 (Version 1.1.x) - QSA for Qt 3 reached end of life status July 1st, 2007.  After this time Trolltech will not issue new maintenance releases of QSA for Qt 3. Extended lifetime support for QSA for Qt 3 will be available for purchase.

• QSA for Qt 4 (Version 1.2.x) - QSA for Qt 4 will reach end of life status December 1st, 2008. We will issue maintenance releases for QSA for Qt 4 at regular intervals but do not plan on adding new features.
  

Qt Script Replaces QSA
As of Qt 4.3, Qt contains a new scripting engine conforming to ECMA Standard 262 (ECMAScript version 3/JavaScript version 1.5). We advise  users and customers  in need of  scripting  to use /migrate to the new scripting engine. 
Learn more about Qt Script