ATITool received an update sometime ago that makes it compatible with nvidia cards. Also, since it includes a built-in benchmarking tool that tests for artifacts, it can be very useful for overclocking.
Irfan View, while not special in its own right, is still a free image viewer. Unless someone new to computers or PC gaming buys Photoshop or finds another free image viewer, they're going to be stuck pasting into paint and wordpad.
Around two-thirds of all mods or patches are in .RAR format, making WinRAR gamer specific enough to be on the list. It's still a great utility either way though.
Thanks for the feedback