Nametags
http://dev.bukkit.org/bukkit-plugins/nametagedit/ - NametagEdit
http://dev.bukkit.org/bukkit-plugins/nametags/ - NameTags

Stacker
http://dev.bukkit.org/bukkit-plugins/playerstacker/ - PlayerStacker

Groups / Perms / Chat Formats
http://dev.bukkit.org/bukkit-plugins/zpermissions/ - zPermissions
http://dev.bukkit.org/bukkit-plugins/zchat/ - zChat

Scoreboard
http://dev.bukkit.org/bukkit-plugins/info-board/ - Info-Board

Bossbar
http://dev.bukkit.org/bukkit-plugins/bossmessage/ - BossMessage
http://dev.bukkit.org/bukkit-plugins/bar-api/ - BarAPI

Items
http://dev.bukkit.org/bukkit-plugins/custom-join-items/ - CustomJoinItems
http://dev.bukkit.org/bukkit-plugins/chest-commands/ - ChestCommands

Bans
http://dev.bukkit.org/bukkit-plugins/advanced-bans/

Mutes
http://dev.bukkit.org/bukkit-plugins/mutemanager/

Custom Join and Quit Messages
http://dev.bukkit.org/bukkit-plugins/custom-joins/

Frozen Mobs
http://dev.bukkit.org/bukkit-plugins/citizens

Portals
http://www.spigotmc.org/resources/bungeeportals.19/ (YOU NEED WORLDEDIT AND BUNGEECORD FOR THIS.)
(BUNGEE USERS ONLY :))
http://dev.bukkit.org/bukkit-plugins/worldedit

Thank you for reading this thread! I may be editing this thread and adding more plugins.