Tiny Flashlight + LED - Tiny Flashlight + LED is free to use application that can be used anywhere else, having nicely built-in functionality.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Simple Flashlight - A clean flashlight with an extra bright display and customizable stroboscope.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Task Killer - Task Killer is an application which automatically forces other applications to stop which are running in the background, making you enhance your smartphone performance and battery life.
n8n.io - Free and open fair-code licensed node based Workflow Automation Tool. Easily automate tasks across different services.