Qt Script for Applications (QSA) is a multiplatform toolkit that allows developers to make their C++ applications scriptable using an interpreted scripting language, Qt Script (based on JavaScript). QSA allows developers to make their applications more attractive to end-users, VARs and their own support staff. All three groups are empowered by scripting to compose their own functionality from the functions that the application developer provides, and from the Qt library itself.
Every time some new Trolltech product comes out, you just gotta ask this question. The licensing info isn’t available yet, so much is up in the air. KDE already provides a scripting facility through DCOP, but this adds functionality at a very low-level. Not to start a flame war, but I wonder why a Javascript-based language was developed, instead of embedding an existing language (like Python). Guess we’ll find out soon enough.