A simple task managements application. Open source code at: https://github.com/64J0/Extensions_Chrome/tree/master/TODO.
This extension can be used to track the activities you want to do in a regular/working day, and once the activity is complete you can just mark the checkbox to erase it from the list. In other words, it's just a TO-DO application.
The extension logo has been taken from https://www.flaticon.com/authors/freepik.