Count the seconds, minutes and hours you've been on your PC.
Need a time limit? Or a reminder? Just use GM Time.
It excels in simplicity of use yet highly user-friendly.
Now also fully configurable, yet as portable as ever.
You may also change skins (a skin is included with the download).
Also, no installer needed, it manages all necessary files by itself.
Note; you should read the included README.htm file.