Slack - A messaging app for teams who see through the Earth!
Worked Today - Time tracking for teams who hate tracking time.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
The Track - Customizable time tracking app for macOS, Windows, and Linux
Begin - Create and work with tasks inside Slack
Time Tracking for Freelancers - A simple, fully integrated time tracker for freelancers