In this week's app roundup: music, discovered; 9/11, remembered with photographs; the Invisible Universe, seen; languages, translated; boarding passes, re-imagined; NBC, TNT, TBS, iPadded; turntable.FM, iPhoned; browsers, dolphined; and much, much more.

If you want to jump to see the best apps of the week in a specific platform, click here:

You'll be looking at each platforms app tag page, which means you'll see all the apps listed on the sidebar.