craigslist - craigslist provides local classifieds and forums for jobs, housing, for sale, services, local community, and events
DroneDeploy - Web (cloud) based photogrammetry solutions for drones.
Bedpage - Bedpage is a classified ad posting a website that comes as the alternative to Backpage and offers almost all the major services to post for multiple categories.
Pix4Dmapper - Photogrammetry software for professional drone-based mapping, purely from images.
Facebook Marketplace - Marketplace is a convenient destination on Facebook to discover, buy and sell items with people in your community.
Litchi for DJI Phantom 2 - Litchi for DJI Phantom 2 is an app featured with a panorama mode that enables you to shoot 360 degree spherical and horizontal panoramas through your drone.