Umbrella Here
Umbrella Here is a Kickstarter staff pick project. It is a light that can be attached on an umbrella. It is controlled by a mobile app that tells people that this umbrella is available for sharing. Just like the light you would see on a taxi. When the light is on, it represents that strangers are welcome to come in and share your umbrella.
You can pre-order an Umbrella Here at:
http://umbrellahere.com/preorder/