Goblins! ModWebsite: http://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-mods/1278083-1-7-2-forge-sp-lan-smp-goblins-v-6-0-goblins
Goblins! is a single-player and multiplayer mod for Minecraft ,which adds new enemies (Goblins) and their villages to your world! Those little buggers don't like you at all and are more than willing to kill you! So get your weapons ready, because someone has to exterminate them!
For Minecraft 1.5.1
Goblins Mod V4.1.2 (Minecraft 1.5.1).zip
Goblins Mod V4.1.1 (Minecraft 1.5.1).zip