Permissive by CruzBishop
A plugin that provides advanced permissions via the use of Access Control Lists
Doomlike Dungeons adds dungeons for those who want adventure, danger, and, uh, violence. This was inspired by Oblige, the level generator for Doom and similar games
survival dungeons worldgen
WorldAndGenerationTweaks by Thebombzen
WorldAndGenerationTweaks provides various assorted tweaks to terrain generation.