Talking Clock from APH is a free program. Just start the program and minimize it while using your computer. The time will be announced every fifteen (15) minutes.
To install Talking Clock, download and run the setup program. After setup is finished, pick Talking Clock from your desktop.
The program has the following featurs:
Resizable window with large print display of the time. You may resize the window and the time will always appear in the center.>
To hear the current time announced you have two methods. From the keyboard, press the Space key, or with the mouse, select the View menu Say TIme item. This will say the time in a concise manner.