Your time is your product. Every minute you spend working that goes unaccounted for is like giving away your product for free. Tracking your time accurately is essential to staying profitable.

In addition, knowing how much time you spend on past projects, can allow you to better estimate future projects. Do you know how much time you spend in meetings? On the phone? Promoting yourself? Making sales calls? Keep track of anything with Klok’s simple work timer and visual display of how your days “fill up”.

URL: http://klok.mcgraphix.com/klok/index.htm

Here we have a free open source timetracker that tracks work time and prints out a summary of your activities on demand. Yearly, monthly, daily, by customer, by project, by action …
Usage is really easy. Due to Kimai’s web browser based interface it runs cross-platform. Likewise you can install it as a web service or as a single-user program on your local workstation.
Kimai does not have to run to do the recording. You can even quit your browser. Your time is still recording until you stop it from any web browser that has access to your installment. It is designed to hold lots of users but you can use it for a single user if you need to.

Kimai is localized in English, German, Dutch, Spanish, French, Italian and Portuguese.

URL: http://www.kimai.de/index.php?article_id=8&clang=1

With voo2do you are able to organize tasks by project, track time spent and remaining, add tasks by email and publish task lists new. It supports some basic sharing of tasks and it is completly free.
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WR Time Tracker is a simple, easy to use, open source, web-based time tracking system. WR Time Tracker uses PHP and MySQL database. It runs on Linux, FreeBSD, and Windows (with IIS or Apache web server). It works over the Internet in any popular browser and allows you to do the following: Create user logins and organize them in teams. Create and modify projects and activities. Input work time.Generate reports and invoices and send them via e-mail.

myHours.com is a time management, timesheet, time tracking solution. It enables you to track your work time, projects you work on and tasks you perform. It is web based and can be used from any location at any time. (myHours is at the moment completely free to use. When we will start to charge for the use of myHours is still unknown. All users will be notified before this happens.)

With Tiktrac you can create sheets that closely match your business requirements and generate reports with unparalleled flexibility, filtering and charting capabilities. YOu can quickly view what people have been working on using their profile reports. It works with popular phone web browsers. It is free for 5 people, 2 sheets and 3 Clients.

With this free online time tracking too you can define the activities people do, set up budgets to monitor activity, categorize activities for analysis and selection, manage group members and much more.

Kimai is a free open source timetracker. With Kimai you can track work time and prints out a summary of your activities on demand. It’s simplicity is its strength. Due to Kimai’s web browser based interface it runs cross-platform. Likewise you can install it as a web service or as a single-user program on your local workstation.

Track time on projects and track time on clients in this free, sleek desktop widget. Runs on both Windows and MAC. Keep track of your time in the handy My Time report. Export time reports to XML for use in other applications.

If you need a clear and simple way to register time expenses, analyze employee performance, prepare timesheets for billing your customers – actiTIME is a tool of choice. actiTIME is a standalone,web based time tracking freeware with intuitive and friendly interfaces.

This time tracking application has lots of feature like: time tracking & reports, milestones & due dates, tagging & search, timeline & activity log, notifications, rss & iCal, integrated wiki. Its available in different languages and it is 100% free.

Toggl is a free online time tracking tool for consultants, programmers, designers, etc. Perfect for anyone who needs to manage their work hours .

On their website they call it “the world’s best time tracking software”. I don´t know if that is true. Have a look at the feature list and decide for yourself :-) Pricing starts at $9 per month – but you can track 1 project for free.

With SlimTimer you can create tasks and share them with your coworkers. You can time your work and run reports. It´s a FREE Time Tracking tool.

Time Tracker is a free simple tool to keep track of the time you spend on any task.