Well one of them anyway.

1. If we take into account the entire population of the world there exists a great number of programmers out there - So when I have an idea for a small but useful tool there is a good chance that it will already exist.

Just like tonight when my thought process went something along these lines:

Ya know, Im sick of looking at that black screen with the windows logo when my computer goes into screen saver mode…

Maybe I should download a screensaver - Just a simple slideshow of nice images. Maybe pictures of animals or something…

But eventually I’ll get sick of the images and I’ll need to go and download more to add to the slideshow. And that’ll be a pain…

I could probably get them from google image search or maybe flicker?

Wait a minute - flicker has a webservice API…

That means I can write a Screen Saver that pulls images from flicker based on a search query - That wouldn’t be very hard to do as Visual Studio 2005 has a screen saver template built in.

And from our first premise we can conclude that someone has already made such a tool. And you know what? A quick google search revealed that someone had. You can get the flicker.net screen saver over at codeplex

Now I can have an unlimited number of images of dromedaries on my desktop. What will I think of next?