World Edit: http://www.sk89q.com/projects/worldedit/

LWC: http://forums.bukkit.org/threads/sec-mech-lwc-v3-30-10-official-languages-lightweight-inventory-protection-management-953.967/

iConomy Chest Shop: http://forums.bukkit.org/threads/econ-iconomychestshop-2-75-chest-shop-for-major-economy-plugins-953.4150/

iConomy: http://forums.bukkit.org/threads/econ-iconomy-5-0-1-eruanna-953.40/

Permissions: http://forums.bukkit.org/threads/admn-dev-permissions-3-1-6-the-plugin-of-tomorrow-935.18430/

Essentials: http://forums.bukkit.org/threads/gen-sec-econ-tp-admn-essentials-v2-4-a-collection-of-useful-commands-and-features-953.15312/

World Guard: http://forums.bukkit.org/threads/sec-worldguard-5-2-block-fire-ice-melt-mushrooms-advanced-fast-area-protect-blacklist-928.790/

Heroic Death: http://forums.bukkit.org/threads/info-heroicdeath-v1-8-1-customizable-server-broadcasts-on-player-death-211-860.3255/

FACTIONS: http://forums.bukkit.org/threads/sec-fun-factions-1-3-7-guilds-war-and-user-controlled-antigrief-953.19063/

Anticreeper and TNT: http://forums.bukkit.org/threads/mech-anticreeper-v0-1-creepers-only-damage-players-953.20331/

CommandBook: http://sk89q.com/projects/commandbook/customize

God Commands: http://forums.bukkit.org/threads/admn-misc-god-powers-harness-the-power-of-the-minecraft-gods-953.1097/

Color Signs: http://forums.bukkit.org/threads/mech-misc-signcolours-0-7-add-a-little-colour-to-your-signs-953.24464/

Time and Weather Votes: http://forums.bukkit.org/threads/mech-bcvote-v0-6-vote-for-day-night-or-sun-rain-weather-time-permissions-953.20306/

And iChat-p3