International cricket
Most games are played as parts of "tours", when one nation travels to another for a number of weeks or months, and plays a number of matches of various sorts against the host nation. The ICC also organises competitions that are for several countries at once, including the Cricket World Cup & ICC T20 World Cup.
ICC Six Nations Challenge
The ICC 6 Nations Challenge was a cricket tournament played every two years between 2000 and 2004. It was a tournament involving the best associate members of the International Cricket Council, who were joined in the first two tournaments by A teams from Zimbabwe (2000+2002) and Sri Lanka (2002 only). Its place has been taken in the international cricket calendar by the ICC World Cricket League Championship (initially known as World Cricket League Division One), which performs the same function.