Plugin suggestion

I am looking for a plugin that has tournaments that randomly pop up in chat. so basically it would say in chat "Most blocks mined in 10 minutes wins 3 diamonds" or "Most mobs killed in 10 minutes wins X" Here is an example - I have found a few tournament plugins, but they don't do that. I swear I saw one not long ago, but didn't remember to bookmark it or anything and i've been struggling to find it again. If anyone has a link to one or something similar, please let me know!