LendList - Never again forget what you borrowed from someone and keep track of what your friends borrowed from you (Android app). - raphaelm/lendlist
Google Earth VR - Walk the earth in VR
You Borrowed It - Keep track of who borrowed what and when you can expect it back
Relief Maps - 3D GPS for outdoor sports
Outdoorsy - Find the best RV rental
Mountain hub - Your real-time network for the outdoors