Gone - An ephemeral to-do list
Automa - A Chrome extension for automating your browser by connecting blocks.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Check - Check is a unit testing framework for C, which runs on environments such as GNU/Linux, GNU/Hurd, BSD, and Mac OSX.
Scriptable - Automate iOS using JavaScript