Bubble is a visual programming language and platform for creating web and mobile applications. It is a no-code development platform that allows users to create and deploy powerful web applications without needing to write code. Bubble is designed to make web and mobile app development easier and faster. It provides a powerful set of tools to build applications with a simple drag-and-drop interface. Bubble is ideal for entrepreneurs, developers, and designers who want to quickly create and prototype web and mobile applications without needing to learn complex coding. With Bubble, users can create apps for any purpose, including customer relationship management (CRM), e-commerce, or content management systems (CMS). Bubble is also highly extensible, allowing users to customize and extend their applications with custom code and plugins.
The discontinued Macaw was acquired by InVision: http://macaw.co/invision/ The latest version, 1.6, released in January 2016, can still be downloaded from the official website.