Development Skills for Travelling Freelancer

[netanderthal]

Im a Java developer with mostly core/frontend experience and Im planning to take a 6month-indefinite sabbatical in the end of the year with my wife to travel, see the world, and gather great memories before I settle down for good. I generated a good amount of savings and no debt but I still would like to use my skills while abroad to generate some extra income every now and then.
What are usefull skills for short-term telecommuting/freelancing projects that I can possibly take on remotely from anywhere in the world and be able to stand out from crowds and crowds of developers from the cheaper labor countries. This most likely means web development using rails, django, python, etc. Any input would be appreciated

[JPnyc]

Are you referring to short-term contracts with a company, or true freelance? Because if it's the latter, every freelancer I know works from wherever they live or happen to be. If you're talking about the former, in my experience most of those contracted positions are on site.

[netanderthal]

i envision freelancing as remote projects that can range from short-term to medium length(6 months or something) but major requirement is that I work remotely since i intend to travel around and stay in one place no more than 3-4 weeks.