I have these succulents and I don't know their name. The big one on the left is Haworthia attenuata, but the small ones are a mystery to me. Usually their leaves are curved upwards, but now are downwards because of the lack of light. I think they might be a species of Sempervivum, although I don't know which one.
This would appear to be Sempervivum tectorum (common houseleek). That is an arrangement of matured rosettes, and not the natural growth habit of the plant. Another name for it is hens and chicks.