AppFlower

AppFlower is an open source app builder for building web-based applications without the need for prior knowledge in programming or coding.

AppFlower automates application development, giving you the tools to build custom business applications without coding. It's a business application platform, with visual drag-and-drop, works across all devices and much more. Their visual application builder makes it easy for the mass to create web applications using drag-and-drop components. They believe web application development should be fast and doable by everyone.