The grey, mounding plant in the front is known as Licorice Plant (Helichrysum petiolare). It is a drought-tolerant, evergreen shrub in the Cudweed Tribe (Gnaphalieae) of the Daisy Family (Asteraceae). It is native to southern Africa.
Behind is a spineless cultivar of Prickly-pear Cactus (Opuntia ficus-indica or similar) and behind that is a robust, grass-like plant. It could be a kind of true grass (Poaceae), but Bear-grass (Nolina spp.) in the Butcher-broom Family (Ruscaceae) should also be considered.