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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.Tech Domains — Building a tech startup? Build it on a .tech domain. On the house for Product Hunt makers
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.