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.

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.

solidtime is a modern open-source time tracking application designed for freelancers and agencies. It features project, task, and client management, billable rates, multi-organization support, and data import from other tracking apps. It offers self-hosting and is licensed under AGPL-3.0.

TEMS (Time and Expanse Management System) is a time and expense management system that enables users to track time and expenses across multiple projects and users. It also assists administrators with billing and invoicing, making it useful for organizations needing integrated time and expense tracking.