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!
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Splittable - Shared living made simple
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
EquiTable - Split the bill fairly
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.