Clock Tab is described as 'Clock tab allows you to view the time right in your web browser!'. There are more than 10 alternatives to Clock Tab, not only websites but also apps for a variety of platforms, including Windows, Android, iPhone, Chrome OS and Android Tablet. The best alternative is Google Clock, which is free. Other great sites and apps similar to Clock Tab are Clock + (Free, Open Source), Eusing Clock (Free), Clockwise (Paid) and ChirpyTime (Paid).
Clock! is an analog clock replacement for windows with embedded alarm management. The ultimate clock for your desktop: Clock! Features •Beautful! You'll love the 50 themes provided! •Smart! It remembers your appointments!