The best alternatives to Pickabox are Twitter, Wikiscope, and Cwiki. If these 3 options don't work for you, we've listed a few more alternatives below.
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Hurreeβ The smarter, simpler way to analyze your data
Wikiscope uses your phone's current location to find Wikipedia articles tagged to the world around you and overlays them on to your camera using Augmented Reality. You can view articles on a 2D map too.