Today the hardware virtualization subsidiary of Quest, Vizioncore, updates two products of its growing portfolio: vOptimizer Pro and vFoglight.

The first one, a technology that Quest acquired from Invirtus in July 2007, now reaches version 2.2
vFoglight (formerly esxCharter and then vCharter) instead hits version 5.2.6.

Source: http://www.virtualization.info/2009/06/release-questvizioncore-voptimizer-pro.html