Any automated contest plugin?

Hi Folks.

I’ve been searching for a plugin lately which is like an automated contest plugin, such as a Automated Referral System or any type of contest system. I have been wanting to hold a contest at my website which is powered by WP, but doing the contest manually is going to be a very big hassle.. so I was wondering if a plugin like this existed.

I have been searching for a while, but have not been successful. I keep coming up with the Plugin “Popularity Contest” which is what I DO NOT need.

Thanks.