WR Time Tracker is an open source, web-based work time tracking system. It is simple and very easy to use. It works as a web service and allows you to: create user logins and organize them in teams, create and modify projects and activities, input work time, generate reports and send them as e-mails. The system runs on FreeBSD or Linux. Free hosting of this service is available for public at http://timetracker.wrconsulting.com.