GPortfolio - Create an automatic portfolio based on Github profile.
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Appolo - Static app portfolio for developers
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.
GitShowcase - Plug and play portfolio for developers
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.