MOZiE – split screen Mozilla and IE
Via Mozillazine – MOZiE. A clever patchwork of technologies that allows you to view pages with Internet Explorer (5+) and Mozilla (1.5+) simultaneously, as well as other cool features like simulating the pages in various screen resolutions and running pages through the W3 validator at the click of a button.
The work is actually being done by Internet Exlorer, taking advantage of HTA while the Mozilla pane is made possible thanks to Adam Lock’s Mozilla ActiveX Control (Mozilla embedded into IE – very nice).
[Not PHP I know, but too good to ignore]