Almond Press “would like to share with you our curated list of writing competitions scheduled for 2016. Included are details about max word count, associated fees, submission deadlines, and direct links to each event.”
You can search through this list in a number of ways, including by Country, Closing date, Word count, Entry fee, and Top Prize. You can also do a keyword search of the listings. Plus, to receive updates all your own, you can sign up to have updates sent to your e-mail address. Can’t get much easier than that.
It is probably not an absolute complete list, but it’s a good resource and fairly easy to access. Much of the work, other than the writing and submitting, has been done for you.