There is this competition by Samsung asking every blogger to write about their favorite
PC application. I will give my vote to Google desktop.
Being a news junkie, this application allows me to get news from various sources in the cyber world by putting their URL.Some Favorite news channels can be easily added and also video channels.
It has got the time, weather of my home town and also a small box showing my CPU,memory,disk etc are being monitored continuously.
Scratch pad gives a chance for small write ups which will be saved automatically.
There are plenty of other interesting things which one can add to this application. I donot know whether this will work in lap top or a tablet as I donot own any of them.
This also takes only 4 KB memory space
But I am very happy with this application on my desktop