Twitter Audience Insights - Loads of info about your followers, their interests, & more
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Owlead - Grow your Twitter with valuable followers, effortless
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Retargetlinks - Turn every link you share into targeted ads
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.