Node.js on App Engine - Fully managed Node.js serverless application platform
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Manifold - Manifold GIS is a combination of mapping, CAD, DBMS and image processing.
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
manifoldco - Everything you need to sell your tools, services, and APIs
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.