I always find myself playing these a lot for some reason.
Minecade (Super Craft Brothers, Villager Defense, The Walls, Minecraft Trouble in Terrorist Town)
IP: MINECA.DE
The Hive (Survival Games, Trouble in Mineville, The Herobrine, Hide and Seek, Splegg, One in the Chamber)
IP: hivemc.eu
The Shotbow Network (Shotbow Games, Death by Void, HardCore Factions, Ghostcraft, Last Man Standing, Wasted, MineZ, Smash!)
IP: us.shotbow.net
Snapcraft (Earth Game, Hunger Games, Survival, Factions, War Game)
IP: mc.snapcraft.net
What are your favourite Minecraft minigames?