Scavenger - An augmented reality scavenger hunt for cash prizes
dropdrop - Leave messages where you travel for others to discover
Gift Hunt for WordPress - Online treasure hunt on your WordPress site
Flotogram - Take photos and leave them floating in space
PlayTours - Create robust and affordable team-building games such as scavenger hunts, team races, gamified events, and self-guided tours. Get an Unlimited free trial.
World Brush - AR app where you paint on the real world for others to find