Sesame Database Manager - Lantica Software, LLC - Sesame, A Q&A-compatible Database Manager.
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Sheep - Membership and events for SMEs and nonprofits
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.
DbFace - DbFace is an online database application & report building tool.
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.