First, a couple posts from the judges point of view...
How to win a creative writing contest.
How not to write a story.
Now, for the contests...
My Favorite Grandkid Story - for writers over 55.
Tell Your Love Story
PARSEC SF/F Contest - themed "the color of silence"
Novel Beginnings 1st Chapter Contest
The Christmas Spirit
On The Premise - another themed contest.
Be sure to check and follow the guidelines.