Speaking of poking at pictures, Windows 8 suffers from a dearth of lightweight image editors. Instagram's a no-show, and even Adobe's Photoshop Express app is mostly meh. One free app stands out from the crowd, though: Fhotoroom.
This Windows Phone transplant packs a bevy of editing tools, picture frames, filters, and more to help you add those finishing touches to your candid camera shots under 4 megapixels in size. (A $1 upgrade removes that restriction and adds a few more tricks.) Even if you're not interested in participating in Fhotoroom's in-house social network, you can still share your tweaked pics on Twitter, Facebook, or Flickr. Groovy.