Nitpicking notes 😉: Aloe and Haworthiopsis are each a separate genus in the Alooideae subfamily.
If it has little white flowers, it's genus Haworthia or Haworthiopsis or Tulista and these are pollinated by insects.

If it has red flowers, it's an aloe. The sturdy flower stems enable bird pollination and the red colour is attractive to bird eyes although some of the smaller species are pollinated by insects too

Your last one is a Sempervivum, from Europe, also known as houseleeks