Article Spinner or Article Rewriter, as the name itself gives you an idea, is a rewriting tool or a paraphrasing tool that allows people to rewrite their content while saving significant amount of time. Many such article rewriter and article spinner tools are available over internet. Some article spinner tools are completely free, requiring no installation or fee while some article rewriter tools can ask you to sign up or pay.
Anyone can do this, all you need is a computer and the ability to string a sentence together. You can write original articles and submit them to article directories and get paid. You have to apply to these sites and may or may not get turned down. If you should happen to get turned down then just keep plugging away until you find someone to "hire" you.