GoodBarber - GoodBarber is a mobile app creation platform.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Dropsource - Mobile development platform for building native iOS & Android apps
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Siberian CMS - Siberian is an Open-Source and Free App Maker. Unlimited Push Notifications. Unlimited features. Fully Customizable. Download it and build your own app now!
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.