Ontologies for tests

Hello people,

I'm looking for some ontologies that I colud use to test my matching
algorithm. It's being hard to find some good examples of simple ontologies.

Any answer will be good.

Thanks..

And sorry if I wrote something wrong, I'm from Brazil and don't have a good
english...

-- 
Atenciosamente,

Kelvin Vieira Kredens
"People can't share knowledge if they don't speak a commonlanguage " (T.
Davenport)