[raelshark]

Can you actually elaborate on number 4 in your list? are you talking about building something for a client but having an agreement that you'll own the software and are licensing it to them, so that you can sell it yourself elsewhere?

[rmcastil]

Exactly. In one case I was associated with the work was done with a collaborative research grant. A laboratory had the need for a custom Laboratory Information Management System (LIMS). We built the software as they specified but retained ownership of the source. I know it sounds crazy because it's a win, win situation. Then we were able to market/sell that software to labs that had the exact same need (a niche market). Then years later I was able to secure a support contract for the original lab because I was the only one willing to support it. Which has in turn, turned it very specialized freelance work. All of which can be considered recurring revenue.