/Tab - The simple way to split a bill among friends.
BreezoMeter - Health-focused Environmental Intelligence
Splitwise - Splitwise is a free tool for friends and roommates to track bills and other shared expenses, so that everyone gets paid back. On the web, iPhone, and Android!
World Air Quality Index - Air quality index for the globe
Splittable - Shared living made simple
Flow by Plume Labs - The smart air quality tracker to help you find clean air