Confluency Cards are a free downloadable game from Elton Ersch of Japan (or he simply teaches in Japan). The idea is to help build conversational fluency.

To play, players maintain three cards in front of them, each of which prompts you to formulate a question or answer using certain phrases or formats. It can be played an an activity, or with a goal. After using a card, it is discarded and a new one is picked.

I must admit to laughing out loud at the sample session video, but they’re actually pretty neat and simple. The site includes instructions on how to make your own cards.