Webkit does not include the JS engine. And the different approaches to rendering is also incorrect. Google has Blink which is - for all intents and purposes - W

Webkit does not include the JS engine. And the different approaches to rendering is also incorrect. Google has Blink which is - for all intents and purposes - Webkit. IE6 was closed source, and under control of one company. Webkit is open source with contributions from many major organizations.