Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
SBSettings - Access the important settings and functions of your jailbroken iPhone/iPod Touch directly on your...
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.
Do Not Disturb Toggle - Do Not Disturb Toggle allows you to switch on and off your phone to automatically mute incoming calls and notifications.
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.
Power Toggles - An advanced power control widget for both your homescreen and notification panel. Free without ads.