WebKit is an open source application framework that provides a foundation upon which to build a web browser. WebKit was originally derived by Apple Inc. from the Konqueror browser’s KHTML software library for use as the engine of Mac OS X’s Safari web browser, and has now been further developed by Apple, Nokia, Google and others. The framework is now used by Omniweb, Shiira, iCab, Adobe AIR, Google Chrome, mobile phones (including the iPhone), Nokia’s Series 60 browser and Google’s Android platform. Although WebKit is included with Trolltech’s Qt 4.4, the underlying framework for KDE,the KDE project will use its original version of KHTML for the near future.
It passes the Acid2 test, and as of March 2008, latest nightly builds of WebKit score 100/100 in the Acid3 test with pixel-perfect rendering and no timing or smoothness issues.