I have a tiny jar of
Vegemite in my house, which is the yeast extract used largely in
Oceania.
Marmite is the closest thing commonly found in
Europe, and more specifically
Britain. I have tried it a few times, but I don't like it all that much. I know that if I had a few weeks of it, it could come to be one of my favourite spreads, but it is made by
Kraft, and I
boycott Kraft.
Other brands of yeast extract include
Marmite and
Promite.