We made some decent money with our library however since we live in very expensive area I do some consulting as well. If you are single and live in not so expe

We made some decent money with our library however since we live in very expensive area I do some consulting as well. If you are single and live in not so expensive place making software components could be a viable business. Just chose something that will not become obsolete in 2 or 3 years. We are in the PDF space that is quite crowded but still much better than Flash (for example) that is becoming less and less relevant. If I had to start today I would probably look for some security related stuff.