Christopher Fielden has recently updated his very useful list of writing competitions. He has listed comps in various categories, which makes it easier to find what you're looking for. So you'll find lists of prestigious comps with big prizes, annual comps, one-off comps, and more.
You can also see, at a glance, the closing date, entry fee (if any), word count, and prize. This is handy, as it saves clicking through to the comp site only to find your story doesn't fit the word count or that you've missed the deadline!
If you enjoy entering writing competitions check out his page here.