Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Habit List - Create good habits and break bad ones with the app that keeps you focused.
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.
Momentum - Agile goal and performance management
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.
Habitica - Habitica is a free habit building and productivity application.