Klokki for Mac - Rule-based automatic time-tracking
Worklogs - Easy time tracking for remote teams working on Slack.
Time Tracking for Freelancers - A simple, fully integrated time tracker for freelancers
Clockify - Simple and free time tracker. Perfect for small and mid-sized businesses as well as freelancers. Unlimited projects and users, unlimited productivity. Get all the premium functionalities, completely free.
Time 2 - Stay focused and crush procrastination
The Track - Customizable time tracking app for macOS, Windows, and Linux