Minecraft wiki entry for Spawner_traps, associated text: 1 Finding dungeons
2 Simple farms
2.1 The Front
2.2 Redstone and other contraptions
3 Killing mechanism
3.1 Lava blade traps
3.1.1 Timed lava dispenser
3.2 Drowning traps
3.3 Flow trap
3.4 Sunlight based traps
3.5 Potion-based trap
3.6 Iron golem traps
3.7 Wolf traps
3.8 Cactus traps
3.9 Fall damage
3.10 Villager traps
3.11 Blaze traps
3.12 A note on lava
3.13 "Johnny" Vindicator Trap
3.14 Magma trap
4 Other
4.1 Pit trap
4.2 Experience trap
4.3 Efficient pit + experience trap (by Epiiik)
4.3.1 Alternative layout
4.4 Another experience trap (by AlexxShadenk777)
4.5 Experience trap
4.6 Humanoid monster spawner xp trap (by HeofShadow)
4.7 S-bend design
5 Multiple spawners of the same species
6 Videos