The first one definitely looks like Haworthia reinwardtii, which one I would not be able to say. One other alternative could be H. coarctata.
To me the other two both look like Gasteraloes. I do not think that he 2nd picture is the plant that it reminds you off. No teeth on the margin of the xGateraloe 'Pauline', which your plant has. Could convince myself that this is some kind of miniature Aloe.
The third plant reminds me of XGasteraloe 'Royal Highness', but as with most aloe hybrids there are many very similar ones out there so tracking down the exact cultivar/hybrid name is going to be tough.
