If you have a particular expertise in terms of making programs on the internet, then the chances of earning very wide open and not many competitors.

What are they?

- Creating Software and Online Applications

Creating software or a particular functional application does need the expertise and therefore not many people who can do it. This means, if you can produce a useful software, then you can just sell it on the internet and make money from that product!

- Being a Web Designer / Web Developer

You will be very lucky if you have the skills to be a web designer or web developer. You can just sell your services on the internet and earn a living from it.

- Being Theme Designer

If you can create a theme (template) for a specific site or blog platform, then this could also be a source of online income by selling the copyright and the right to use the results of your work to others. Especially if you work really good quality!

- Make Your Own Search Engine

Some PHP developers plunge into this field and generate passive income from the internet. I know of a PHP developer from Paris France that produces hundreds of millions of rupiah just from the search site PDF, eBook and MP3 are made.