I think your haworthia might be a haworthia pumila! I have one at home too, but it hasn't grown much since I first got it.

I am not sure if that is H. pumila. H. fasciata has very smooth inner leaves - so I would vote for that...but could be wrong. IIRC, pumila has shorter, fatter leaves - plant seems to be more stout. Here is my H. pumila:

#4 could be xGraptoveria 'Fred Ives'

Thank you both for the feedback. H pumila seems to have the white dots on both sides of the leaves. I did get the highest search hits with H fasciata but was still on the fence because of some minor features. But it seems the best guess so far.

EDIT: @Rina, thanks for adding the pic of H pumila

Oh yes, I think you're right that its not H pumila. I failed to notice the smooth inner leaves!

#4 look like my Graptoveria Fred Ives.

Just saw Rina said it first, so I agree with her.