Cattr is an open-source time tracking tool designed to monitor employee productivity through features like screenshot capture, automatic activity detection, and customizable extensions. It supports on-premises deployment for secure data storage and transparency, making it highly relevant for teams needing robust time tracking solutions.

Ehour is an open source time tracking software that enables teams to log work hours, manage timesheets, and export productivity reports in multiple formats.

Titra is a self-hosted, open-source time tracking and project management tool for freelancers and small teams. It enables users to track time, manage projects and tasks, and generate detailed reports and graphs.

aitrack.work is a minimal, open-source self-hosted task-based time tracker for everyday use, enabling users to organize and monitor time spent on tasks.

Kimai is a free, open-source time tracking software supporting unlimited users and timesheet entries. It offers a responsive design, plugin support, and multi-language capabilities, making it highly suitable for teams and individuals needing flexible, extensible time tracking.

django-timepiece is a multi-user, open source application for tracking employee time on projects. It provides features such as time sheets, project and business management, dashboards, payroll reporting, and invoicing, making it directly relevant for time tracking needs.