Why people use the following pattern instead of singleton

I heard that singleton is useful and popular ,but the fact is that I seldom see it appears in open source projects.

Instead,I always see people to static method.

The following one is an example link

public final class IoUtils {

private IoUtils() {
    }

public static boolean copyStream(InputStream is, OutputStream os, CopyListener 
......
}

}

Singleton Pattern says that just"define a class that has only one instance and provides a global point of access to it".

I think Utils class is suitable to use Singleton because all other classes share to use it.

But Why people nerve use it ?