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.

Jibble is a free and open-source time tracking solution featuring instant face recognition, GPS tracking, offline clock-ins, activity and project tracking, and timesheet management, tailored for teams and organizations.

OpenProject is a comprehensive open-source time tracking software designed for teams and organizations. It offers features such as time tracking, budgeting, detailed reporting, and integrations with popular tools, making it ideal for project-based time management.

Orangescrum is a free and open-source time tracking and project management software. It offers automated timers, manual time entry, timesheet management, reporting, analytics, and extensive integration options for teams.

PhpReport is a web-based time tracking application tailored for teams and companies, offering statistics on users and projects, and integration with external applications.

Redmine is a project management and issue tracking software that includes a built-in time tracking feature. It allows users to track time spent on projects and issues, categorize time entries by activity, and supports multiple tracking methods such as built-in tracker, plugins, and commit messages. Its time tracking capabilities help teams accurately calculate billable hours and monitor productivity.