Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Do You Even List? - Auto updating Twitter list of people you interact with most
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Refined Twitter - A browser extension that improves the Twitter experience
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.
Electoral - Rock your Twitter lists