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.

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.

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.

Timestrap is a free, self-hosted, open-source time tracking program for freelancers. It organizes tracked time by tasks and projects, includes multi-user support, reporting, charts, and can be installed via Docker.

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.

trax is a simple time tracking server built for integration with Mattermost and Slack, supporting ChatOps workflows for team-based time tracking.