Yes, I’m full of competitions at the moment as I am keen to get myself out there and established as a writer.
One of the job boards I look at regularly, though not that often because it usually just links to other sites that have jobs listed, is Freelancewriting.com. I’ve found it a useful general resource so far and have used the site for some advice.
At the weekend though, I discovered the Writing Contests section of the site. A lot of these have entrance fees (expressed in US dollars) but there are many.
Another competition resource for you anyway and it is now free (unlike Duotrope which this year has started to charge for its services).