Hourglass is the most advanced simple countdown timer for Windows. Just enter a time in just about any format, and hit Enter.


The best open source alternative to KTimeTracker is Hourglass. If that doesn't suit you, our users have ranked more than 100 alternatives to KTimeTracker and 19 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to KTimeTracker are Cattr, Kimai, Project Hamster and Tie Tracker.
Hourglass is the most advanced simple countdown timer for Windows. Just enter a time in just about any format, and hit Enter.


Cattr is a free open-source self-hosted time tracker with desktop clients for windows, mac, linux. The key features are built-in screenshot capture, activity detection.




Kimai is a free open source time tracker. It tracks work time and prints out a summary of your activities on demand. Yearly, monthly, daily, by customer, by project, by action …




Project Hamster is time tracking for individuals. It helps you to keep track on how much time you have spent during the day on activities you choose to track.


Tie Tracker is a free and open source time tracking application. Its is meant to be simple and aims to allow you to track working hours across projects.



Micro Timer is a tiny, microwave-inspired timer app for Android. Instead of inventing yet another clever, pretty, tedious method of inputing time, Micro Timer uses the tried-and-true 10-key pad commonly found on microwave ovens.

The Floating Timer app features both a countdown timer and stopwatch that will float on top of other running apps. This app is useful to time activities such as: Exam practice, gaming speed runs (speed-running), gaming boss fights, cooking.








TimeCult allows to create a hierarchy of projects and tasks, collect time metrics, quickly estimate used time per any project/task for a given time period, exchange data with Microsoft Excel and/or OpenOffice.org Calc.

Timer app with seamless GNOME integration accomplished by pretending to be a media player. Ultimately, serves the only purpose — to start a timer quickly and efficiently. Notifications included! Utilizing GTK4, Adwaita and MPRIS interface.



Kapow is a punch clock program designed to easily keep track of your hours, whether you're working on one project or many. Simply clock in and out with the Start/Stop button. If you make a mistake in your hours, you can go back and edit any of the entries by double-clicking...




Baralga keeps track of the time you spent working on different projects. You can record the time spent on a project or you can manually enter and edit activities. This way you can easily memorize when and how long you have been working on each single project.



