Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Power Toggles - An advanced power control widget for both your homescreen and notification panel. Free without ads.
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.
SBSettings - Access the important settings and functions of your jailbroken iPhone/iPod Touch directly on your...
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.
Quick Settings - Your dedicated Android expert remotely or on-site. Technical advisory, creating and reviewing software architecture, Android development, code reviews and trainings.