Tricount - Manage and share expenses with friends
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Kittysplit - The easiest way of sharing costs with a group of friends
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.
ihatemoney - Manage your shared expenses, easily
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.