What about memocamp? I believe they used that for a real competition once, not sure where though.
http://www.memocamp.de/english/disziplin
You might need to pay for it, but it’s probably worth it if you are into memory competitions. It’s only 5€ for a person per month if you go for a yearly subscription.
Why bother doing that, when you can get the official software that is used in the competition for free? 