Regard3D - Regard3D is a free, multiplatform, open-source structure-from-motion application.
Google Opinion Rewards - Answer quick surveys and earn Google Play credits with Google Opinion Rewards.
Pix4Dmapper - Photogrammetry software for professional drone-based mapping, purely from images.
Receipt Hog - A fun and rewarding way to turn everyday shopping receipts into cash.
ContextCapture - Acute3D develops breakthrough photogrammetry software solutions to automatically turn photos into photorealistic high resolution 3D models
FreeMyApps - FreeMyApps lets you get rewarded for watching cool videos, playing fun games, and trying new apps.