Mobs

Current Mobs. ..
 * Cow
 * Pig
 * Sheep
 * Chicken
 * Squid
 * Wolf
 * Zombie Pigman
 * Zombie
 * Skeleton
 * Spider
 * Spiderjockey
 * Creeper
 * Slime
 * Ghast
 * Human/Monster
 * Giant

Spider Jockey . . .
Spider Jockers (Spider Jocks for short) is a Skeleton riding a Spider and are quite rate

Giant . . .
Giants are not natural but can be spawned with Mods for bukkit or the Minecraft Client

CraftBook Website - Spawn Any mob with an IC