Baboon Spider (Theraphosidae)
Harmless!!

Black-widow Spider (Latrodectus)
Deadly!

Garden Spider (Argiope australis)

Southern Blackleg Orbweaver (Trichonephila fenestrata)

Huntsman Spider or Rain Spider (Palystes superciliosus)
Harmless!!

Spider Wasp (Pompilidae) dragging her prey, a Rain Spider, towards her nest

Stink Locust (Pyrgomorphidae)

Caterpillar of the Cape Lappet Moth (Eutricha capensis)

Equine Maiden/Thyretes hippotes

Amber Baboon Spider 

Citrus Swallowtail butterfly; (Papilio demodocus)

Milipede

Gamtoos River Crab (Potomanautes barbarai) 

Bark scorpion (Uroplectes lineatus)