Aluminum
Barbed wire fence
Cactus fence
Chain link fencing, sometimes called "wire netting"
Concrete fence, easy to install and highly durable
Chicken wire, light wire mesh for keeping predators out and chickens or other small livestock in
Dry-stone wall or rock fence, often agricultural
Electric fence
Ha-ha (or sunken fence)
Hedgerows of intertwined, living shrubs (constructed by hedge laying)...