Shapr - A completely free way to build your professional network.
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Project Fixup - Meet people, not profiles
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.
Smoothie - Blind dates and hook ups
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.