KHTML

KHTML is the HTML rendering library developped by the KDE project.

It is used in Konqueror and Apple's Safari_Browser. It is written in C++ and licensed under the LGPL. It supports HTML 4, CSS 1 and 2, DOM and Javascript (officially named Ecmascript. Some extra abilities and quirks from Internet Explorer are supported, even though they are not part of the HTML standard definition.

KHTML is very fast, but less error tolerant than gecko_layout_engine, it's main open source rival from Mozilla.