Don't care about tweetdeck, etc. However, when setting up a PC, instead of digging through all those (and more,) I can recommend going to ninite.com. Pick from a bunch of programs - including skype, chrome, opera, most of those mentioned here and more. Get a custom installer. Download, run, come back a few minutes later - done.
Yeah, you can do it yourself by going to each site, but hey, one stop shopping, as it were. (And no unwanted addons.)
(Of course, if your'e running the Win8 preview, you then spend the next 20 minutes deleting the uninstallers, readmes, etc - all the stuff formerly hidden by start menu folders - from the metro start screen, but that's a Win8 issue.)