For viewing pictures on the net in a very cool layout, as if you have a 3-D photo (and video) wall, an add-on exists for the Firefox web browser. And for Safari, for the iPhone, for Linux... in short, for almost all of us except for who stays with slow and cumbersome MS-Explorer ;-) That is Cooliris. Some time ago, an update was launched that also works with the pictures on your own computer! Very cool software indeed, as the picture here shows.
Cooliris is only a browser, so it cannot replace your Irfanview, which has conversion and archiving options (to name just a few), let alone Lightroom. But it is so fast & cool-looking!