What is the differnce between Metis, Hmetis and Parametis?

Hi,

I want to ask What is the differnce between Metis, Hmetis and Parametis?
If I want to partition a hyper graph with millions of node, which is the best?
I need a faster one...

thanks,

RE: hMetis, as it is the only

hMetis, as it is the only tool that can handle hypergraphs.